Search results

1

Radionuklidy kosmogeniczne w meteorycie Antonin

100%

Tymiński Z.

Acta Societatis Metheoriticae Polonorum

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2023

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vol. 14

192-199

EN

The Antonin meteorite fell on July 15, 2021 in Wielkopolska Voivodeship. Its fall was recorded by fireball camera network and the meteorite specimen was recovered soon after, during a dedicated search expedition. Main mass of Antonin was provided for scientific research relatively quickly after recovery, thanks to which the studies of cosmogenic radionuclide concentrations were carried out in the g spectrometry laboratory at the National Center for Nuclear Research in Otwock/Świerk. The analyses revealed concentration of 7Be and the traces of the cosmogenic radionuclides of 48V and 51Cr, whose half-lives are in the range of 15–28 days, clearly confirming the relationship of the specimen with the observed fireball. The relatively high concentrations of 58Co, 56Co, 46Sc, 57Co and 54Mn (half-lives of several months) also confirm the recent fall of the specimen. Additionally, collected radionuclide data allow to estimate pre-atmospheric size of the meteoroid. Distribution of 60Co and 26Al indicates a meteoroid chunk with a radius of 20–25 cm. The result of 26Al measurement suggests that the investigated meteorite fragment comes from a rather shallow depth of this meteoroid. In addition, the original mass of the meteoroid from which the Antonin meteorite originated was estimated to be less than 100 kg, most likely 70 kg.

2

Raport z działalności PKiM oraz PFN w latach 2021–2022

100%

Tymiński Z.

Acta Societatis Metheoriticae Polonorum

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2023

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vol. 14

183-191

EN

The Polish Fireball Network (PFN), has been undergoing continuous development. Since then, several large grants have been obtained, which were at least partly used for modernization purposes. In recent years, two more grants have been obtained, which allowed for the expansion and modification of the existing PFN infrastructure. In 2021, the PFN76 Kozienice was modernized, but also the PFN14 Zielona Góra station was reactivated and the new PFN77 Suhora station was launched in 2022. Thanks to these improvements, the tracking of meteoroids entering the Earth Atmosphere above Poland became more accurate, which facilitates the search for meteorites and increases the chances of finding new fresh meteorites in Poland. On the night of May 10, 2021, PFN stations registered an exceptionally slow bolide. The phenomenon named PF100521 Wykrot appeared over central Poland in the Mazowieckie Voivodeship at 21:32 UT and calculations showed that some meteorites may have fallen. This phenomenon was used to conduct a series of analyzes to show how observational uncertainties affect the final results. Two variants of the results are presented in this work.

3

Zastosowanie neutronowej analizy aktywacyjnej NAA do identyfikacji materii pochodzenia kosmicznego na Ziemi

64%

Tymiński Z., Mysłek-Laurikainen B.

Acta Societatis Metheoriticae Polonorum

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2009

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vol. 1

97-100

EN

Neutron activation analysis (NAA) is an analytical method based on the measurement of characteristic radiation from radionuclides formed by neutron irradiation of the material of interest. The most suitable source of neutrons for NAA is a research reactor. The neutron activation analysis has been found to be extremely useful in the determination of trace and minor elements in geological and extraordinary samples. The method is non-destructive, giving many advantages, which are described. Measured abundances of the elements in meteorites, from major constituents down to those appearing only in trace amounts, provide information important for the theories of the origin and history of the Solar System.

4

Planowanie i organizacja wypraw poszukiwawczych

64%

Stolarz M., Tymiński Z.

Acta Societatis Metheoriticae Polonorum

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2011

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vol. 2

200-201

5

Prospekcja powierzchniowa składu pierwiastkowego gleby w rezerwacie „Meteoryt Morasko”

51%

Miśta E. A., Tymiński Z., Kalbarczyk P., Trela K.

Acta Societatis Metheoriticae Polonorum

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2015

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vol. 6

96-102

EN

The research was focused on strewnfield in “Meteorite Morasko” reserve. The main goal of the project was to find correlation between chemical composition of soil and concentration of cosmogenic material which was discovered in the region. After field prospection the sampling was made for three reference regions in the reserve. ICP-MS method was used to determine the elemental composition of soil samples. Investigation has been carried out to indicate the chemical components which iron meteorite matrix is built of like Fe, Ni and Co. Results of the study gave information about distribution and correlation of chemical components in the reserve.

6

Powstawanie kraterów impaktowych i ich rodzaje

51%

Brachaniec T., Tymiński Z., Broszkiewicz A.

Acta Societatis Metheoriticae Polonorum

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2014

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vol. 5

30-46

EN

Craters form after meteoroid or asteroid impact son celestial bodies surface are created during three different periods: contact/compression, excavation and modification stage. Depending on its size the craters can be divided into three main types: simple, complex and multi-ring craters. The enormous energy released during the impact forms evident records in basis as shatter cones or breccias and affect the surrounding rock (visible only in micro scale) by shock metamorphism, which has no equivalent in the Earth’s geological processes.

7

Pomiary radionuklidów kosmogenicznych w meteorycie z Oslo i interpretacja wyników

51%

Tymiński Z., Miśta E., Kalbarczyk P.

Acta Societatis Metheoriticae Polonorum

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2013

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vol. 4

115-120

EN

Nondestructive high-resolution gamma spectrometry techniques were used to measure cosmogenic radionuclides in 32.5g fragment of Oslo meteorite which the fall was not observed. Five radioisotopes with half-lives ranging from 278.1 days to 7.17´105 years have been detected. The signals observed for 26Al, 22Na, 54Mn, 57Co and 60Co were interpreted in terms of the meteoroid depth profiles and terrestrial age after the fall. The pre-atmospheric radius of the chondrite was estimated to be >100 cm. Concentrations of short-lived nuclides limits the fall date before December 2011.

8

Sprawozdanie z poszukiwań meteorytów w Oslo

39%

Tymiński Z., Stolarz M., Kubalczak T., Burski M., Zaręba P., Holst M., Bilet M.

Acta Societatis Metheoriticae Polonorum

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2013

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vol. 4

108-114

EN

A piece of a meteorite that had crashed through the roof of a cottage house was find in the central Oslo quarter Rodelřkka at the beginning of March 2012. Some days later the second discovery in the melting snow of Ekebergsletta hilltop plateau triggered the hunting for meteorites in almost all sides of Oslo. The pieces of third meteorite broken by cars and spread out by snowplow was discovered on the asphalt road side by Maciek Burski, the member of Polish Meteoritical Society. Later on the missing fragments of the Maciek’s most east find was collected by Meteoritical Section members of Comet and Meteor Workshop (PKiM) with the help of local meteoritical authorities. The total mass of this unobserved fall is 6.22 kg in five pieces spread out in the eight km-long strewnfield with 200 g and 4.65 kg meteorites on the opposite ends. The Meteorite is not classified yet but unofficial information is “breccia H3-4”.

9

Pomiary izotopów gamma promieniotwórczych w trynitytach

33%

Tymiński Z., Burakowska A., Tymińska K., Kołakowska E., Saganowski P., Ziemek T., Dziel T., Kotowiecki A.

Acta Societatis Metheoriticae Polonorum

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2018

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vol. 9

150-157

EN

Trynitite is a material in form of a glass created as a result of a nuclear explosion close to ground. The mechanism of its formation is similar to the formation of impact glasses and tektites, although the material usually contains trapped bubble voids, much more water and it is radioactive. High resolution non-destructive gamma spectrometry technique was used to measure rdionuclides in the chips of trinitities. The signals were detected for 137Cs, 152Eu, 226Ra, 241Am and 133Ba. The most extreme concentration was found for cesium 137Cs which the specific activity reached the level of 2317 mBq/g. Much lower values were obtained for 241Am – 722 mBq/g, 152Eu – 211 mBq/g, 226Ra – 451 mBq/g and 133Ba – 94 mBq/g.

10

Pomiary 60Co w obiektach z żelazną matrycą

33%

Tymiński Z., Dziel T., Saganowski P., Kołakowska E., Listkowska A., Tymińska K., Żołądek P., Olech A.

Acta Societatis Metheoriticae Polonorum

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2016

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vol. 7

144-150

EN

Radioactive cobalt isotope 60Co is produced in neutron activation process of stable isotope 59Co by neutron capture reaction 59Co(n,g)60Co, in solar wind charge exchange 60Ni(n,p)60Co or in spallation process 62Ni(n,p2n)60Co. These processes are responsible for isotope 60Co production either in nuclear reactor on Earth or beyond – in stars and in meteorites (induced by cosmic rays). In this work the results of 60Co measurements in metal sources by gamma spectrometry laboratory are presented. A metal reference radioactive standards made up of steel cast with discs shaped geometries and different diameters have been tested in gamma-ray spectrometry measurement system. The reference activity concentrations of 60Co were in the range of (0.291±0.010) Bq·g–1 to (1.544±0.030) Bq·g–1. The mean minimal detectable activities (MDA) obtained by series of the 6 to 18 hours lasting measurements of described above standards with HPGe detectors carried out in NCBJ OR POLATOM were in the range of 6.1 mBq·g–1 to 8.5 mBq·g–1. The results correspond to the values of 60Co activity concentration measured in the iron meteorites with young terrestrial ages.

11

15 lat obserwacji – wybrane spadki meteorytów rejestrowane w PFN w latach 2004–2019

33%

Tymiński Z., Żołądek P., Wiśniewski M., Stolarz M., Polakowski K., Myszkiewicz M., Zaręba P., Gawroński M. P., Suchodolski T., Olech A.

Acta Societatis Metheoriticae Polonorum

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2019

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vol. 10

160-167

EN

The Polish Fireball Network (PFN) associated in Comets and Meteors Workshop monitors the sky over Poland regularly for 15 years and registers the bright fireballs over the whole country (Olech 2006; Wiśniewski 2017). Every year we observe a few meteorite falls but due to weather conditions some data are not sufficient for proper strewnfield calculations. In the collaboration with the European Fireball Network the whole territory of Poland is monitored almost regardless of the weather. The publication describes the bolide phenomena characterized by distinctive meteorite falls, so the strewnfield indicated here should become the target of further exploration expeditions.

12

Raport z poszukiwań meteorytów w ramach PFN w sezonie 2016/2017

27%

Tymiński Z., Żołądek P., Wiśniewski M., Stolarz M., Jaśkiewicz A., Myszkiewicz M., Gawroński M. P., Suchodolski T., Polakowski K., Zaręba P., Olech A.

Acta Societatis Metheoriticae Polonorum

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2018

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vol. 9

EN

The Meteorite Section was created in 2010 on demand of Polish Fireball Network (PFN) for the meteorite searching and investigation purposes. The main task of the Section is to find the meteorites dropped from bolides registered by the Polish Fireball Network. Each year, the PFN registers several meteorite falls within our country and meteorite strewnfield inspections must be carried out at least for the masses of above 300 g estimated with the PyFN software. Only last year the PFN organized several search campaigns. Two of them are presented in the publication.

13

Raport z poszukiwań meteorytów w ramach PFN w sezonie 2016/2017

27%

Tymiński Z., Żołądek P., Wiśniewski M., Stolarz M., Jaśkiewicz A., Myszkiewicz M., Gawroński M. P., Suchodolski T., Polakowski K., Zaręba P., Olech A.

Acta Societatis Metheoriticae Polonorum

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2018

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vol. 9

158-163

EN

The Meteorite Section was created in 2010 on demand of Polish Fireball Network (PFN) for the meteorite searching and investigation purposes. The main task of the Section is to find the meteorites dropped from bolides registered by the Polish Fireball Network. Each year, the PFN registers several meteorite falls within our country and meteorite strewnfield inspections must be carried out at least for the masses of above 300 g estimated with the PyFN software. Only last year the PFN organized several search campaigns. Two of them are presented in the publication.

14

Historia oraz stan obecny Polish Fireball Network

27%

Wiśniewski M., Żołądek P., Olech A., Tymiński Z., Maciejewski M., Raj A., Fietkiewicz K., Gozdalski M., Gawroński M. P., Suchodolski T., Myszkiewicz M., Stolarz M., Polakowski K.

Acta Societatis Metheoriticae Polonorum

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2018

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vol. 9

177-186

EN

The Polish Fireball Network (PFN) is a project to monitor regularly the sky over Poland in order to detect bright fireballs. In 2016 the 72 PFN cameras recorded 100 389 meteor events. Using these data and the UFOOrbit software 19 087 trajectories and orbits were calculated. In the following years we are planning intensive modernization of the PFN network including installation of dozens of new digital cameras.

PL

Polish Fireball Network (PFN) to projekt polegający na regularnym monitorowaniu nieba nad Polską w celu zaobserwowania jasnych meteorów i bolidów. W 2016 roku 72 kamery PFN zarejestrowały 100 389 meteorów. Za pomocą tych danych i oprogramowania UFOOrbit obliczono 19 087 trajektorie i orbity. W kolejnych latach planujemy intensywną modernizację sieci PFN, w tym instalację kilkudziesięciu nowych kamer cyfrowych.

15

Raport PFN z poszukiwań meteorytów w latach 2018–2020

24%

Tymiński Z., Żoładek P., Wiśniewski M., Stolarz M., Polakowski K., Jaśkiewicz A., Janasz S., Gawroński M. P., Krzyżanowski T., Kwinta M., Olech A., Piatlicki J., Suchodolski T., Szlagor M., Węgrzyk W., Zaręba P., Zelevich J.

Acta Societatis Metheoriticae Polonorum

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2021

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vol. 12

98-107

EN

Since 2010, the Meteorite Section of the Comet and Meteor Workshop (PKiM) has been systematically organizing exploratory expeditions to selected meteorite strewn fields, calculated from bolides registered with the Polish Fireball Network (PFN). Some of the expeditions organized in the period of 2018–2020, after the phenomena PF140118, PF070119, EN050120 and PF310720 are reported. All these phenomena have a common feature, they reach beyond the borders of Poland – either the analysis was developed in cooperation with the European Fireball Network (EN) or the meteorite fall took place abroad. It is clear that meteor phenomena have no boundaries and for positive research results in near-Earth space science a European cooperation is highly recommended. Many meteorites fallen from the bolides registered in the PFN are still in the strewn field waiting to be discovered. The article presents a study of the most important phenomena happened in two last years, and it is also a hint where to look for meteorites in Europe.

Refine search results

Radionuklidy kosmogeniczne w meteorycie Antonin

Raport z działalności PKiM oraz PFN w latach 2021–2022

Zastosowanie neutronowej analizy aktywacyjnej NAA do identyfikacji materii pochodzenia kosmicznego na Ziemi

Planowanie i organizacja wypraw poszukiwawczych

Prospekcja powierzchniowa składu pierwiastkowego gleby w rezerwacie „Meteoryt Morasko”

Powstawanie kraterów impaktowych i ich rodzaje

Pomiary radionuklidów kosmogenicznych w meteorycie z Oslo i interpretacja wyników

Sprawozdanie z poszukiwań meteorytów w Oslo

Pomiary izotopów gamma promieniotwórczych w trynitytach

Pomiary 60Co w obiektach z żelazną matrycą

15 lat obserwacji – wybrane spadki meteorytów rejestrowane w PFN w latach 2004–2019

Raport z poszukiwań meteorytów w ramach PFN w sezonie 2016/2017

Raport z poszukiwań meteorytów w ramach PFN w sezonie 2016/2017

Historia oraz stan obecny Polish Fireball Network

Raport PFN z poszukiwań meteorytów w latach 2018–2020