Nuclear Data Evaluation for ²¹⁷Th

• Authors: S. Nafee , A. Al-Ramady , S. Shaheen
• Languages of publication: EN

Abstracts

EN

Thorium-217 was produced by the reaction ¹⁷⁰Er (⁵⁰Ti, xn) ^{220-x}Th. The nuclei were studied by Evaporation Residues gamma-alpha-gamma coincidence measurements (ER-γ-α-γ). The evaluated decay data for the ²¹⁷Th nuclide resulted from the above interaction is presented in this report. Three delayed γ-transitions (309, 673 and 1269 keV) have been measured from the ER-γ(-γ)-α correlations and γ-γ coincidences. They were assigned to ²¹⁷Th, based on the level systematics of the N=127 isotones. The evaluated half-lives T_{1/2} for these levels were assigned to be 64-₂₂⁺⁶⁴, 69-₁₇⁺³² and 66-₁₅⁺²⁷ μs, respectively. In addition, an isomeric state (2252+x) keV is presented in the ²¹⁷Th decay scheme between the 2252 (21/2+) and 2362 (25/2+) keV. Q (α) has been updated based on the recent published work of the Atomic Mass Evaluation AME2012 as well. Moreover, the total conversion electrons as well as the K-Shell to L-Shell, L-Shell to M-Shell and L-Shell to N-Shell conversion electron ratios have been calculated using BrIcc code v2.3.

Keywords

EN

21.10.-k; 23.20.-g; 23.35.+g; 29.30.-h

Discipline

• 21.10.-k: Properties of nuclei; nuclear energy levels(for properties of specific nuclei listed by mass ranges, see section 27)
• 23.20.-g: Electromagnetic transitions
• 23.35.+g: Isomer decay
• 29.30.-h: Spectrometers and spectroscopic techniques(for energy loss and stopping power, see 34.50.Bw in atomic physics, and 61.85.+p in condensed matter physics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2016
• Volume: 129
• Issue: 4
• Pages: 669-672

Dates

published

2016-04

Contributors

author

S. Nafee

• King Abdulaziz University, Faculty of Science, Physics Department, 20589 Jeddah, Saudi Arabia
• Alexandria University, Faculty of Science, Physics Department, 21121 Alexandria, Egypt

author

A. Al-Ramady

• King Abdulaziz University, Deanship for Post Graduate Studies, 20589 Jeddah, Saudi Arabia

author

S. Shaheen

• King Abdulaziz University, Faculty of Science, Physics Department, 20589 Jeddah, Saudi Arabia

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Identifiers

DOI

10.12693/APhysPolA.129.669