Excited states in Ra-217 populated in the alpha decay of Th-221

Parr E.; Smith J. F.; Greenlees P. T.; Auranen K.; Chapman R.; Cullen D. M.; Grahn T.; Grocutt L.; Herzan A.; Herzberg R-D; Hodge D.; Jakobsson U.; Julin R.; Juutinen S.; Konki J.; McPeake C.; Mengoni D.; Mistry A. K.; Mulholland K. F.; ONeill G. G.; Pakarinen J.; Papadakis P.; Partanen J.; Peura P.; Rahkila P.; Ruotsalainen P.; Sandzelius M.; Saren J.; Scheck M.; Scholey C.; Siciliano M.; Smolen M.; Sorri J.; Stolze S.; Taylor M. J.; Uusitalo J.

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Excited states in Ra-217 populated in the alpha decay of Th-221

机译：在填充在Th-221的Alpha衰减中的RA-217中的激动状态

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Fine structure in the alpha decay of Th-221(90) , populating excited states in( 88)(217)Ra, was studied using alpha gamma-coincidence spectroscopy. Two alpha-decay branches from Th-221 have been newly observed, with E-alpha(keV)[b(alpha)(%)] = 7951(8)[0.14(3)] and 8247(3)[1.51(12)], together with three previously known branches. Also, two new states in Ra-217 were identified at E = 177 and 227 keV. The ground-state configurations of the odd-A, N = 131 transitional isotones above Pb-208 are interpreted from their a-decay fine structure systematics and considered in terms of predictions using spherical shell and reflection-asymmetric models.

机译：用α-伽马符合谱研究了（88）（217）Ra激发态Th-221（90）α衰变的精细结构。新观察到来自Th-221的两个α衰变分支，其中E-α（keV）[b（α）（）]=7951（8）[0.14（3）]和8247（3）[1.51（12）]，以及三个之前已知的分支。此外，在E=177和227千电子伏时，在Ra-217中发现了两个新的状态。从A-衰变精细结构系统学角度解释了Pb-208上方奇数-A，N=131过渡等温线的基态组态，并根据球壳和反射不对称模型进行了预测。

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《Physical review, C》 |2020年第5期|共12页
作者
Parr E.; Smith J. F.; Greenlees P. T.; Auranen K.; Chapman R.; Cullen D. M.; Grahn T.; Grocutt L.; Herzan A.; Herzberg R-D; Hodge D.; Jakobsson U.; Julin R.; Juutinen S.; Konki J.; McPeake C.; Mengoni D.; Mistry A. K.; Mulholland K. F.; ONeill G. G.; Pakarinen J.; Papadakis P.; Partanen J.; Peura P.; Rahkila P.; Ruotsalainen P.; Sandzelius M.; Saren J.; Scheck M.; Scholey C.; Siciliano M.; Smolen M.; Sorri J.; Stolze S.; Taylor M. J.; Uusitalo J.;
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作者单位

Univ West Scotland Sch Comp Engn &

Phys Sci Paisley PA1 2BE Renfrew Scotland;

Univ West Scotland Sch Comp Engn &

Phys Sci Paisley PA1 2BE Renfrew Scotland;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ West Scotland Sch Comp Engn &

Phys Sci Paisley PA1 2BE Renfrew Scotland;

Univ Manchester Dept Phys &

Astron Schuster Bldg Manchester M13 9PL Lancs England;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ West Scotland Sch Comp Engn &

Phys Sci Paisley PA1 2BE Renfrew Scotland;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ Liverpool Oliver Lodge Lab Liverpool L69 7ZE Merseyside England;

Univ Manchester Dept Phys &

Astron Schuster Bldg Manchester M13 9PL Lancs England;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ Liverpool Oliver Lodge Lab Liverpool L69 7ZE Merseyside England;

Univ Padua Dipartimento Fis &

Astron Padua Italy;

Univ Liverpool Oliver Lodge Lab Liverpool L69 7ZE Merseyside England;

Univ West Scotland Sch Comp Engn &

Phys Sci Paisley PA1 2BE Renfrew Scotland;

Univ Liverpool Oliver Lodge Lab Liverpool L69 7ZE Merseyside England;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ West Scotland Sch Comp Engn &

Phys Sci Paisley PA1 2BE Renfrew Scotland;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ West Scotland Sch Comp Engn &

Phys Sci Paisley PA1 2BE Renfrew Scotland;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

Univ Manchester Dept Phys &

Astron Schuster Bldg Manchester M13 9PL Lancs England;

Univ Jyvaskyla Dept Phys POB 35 FIN-40014 Jyvaskyla Finland;

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中图分类原子核物理学、高能物理学;
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Excited states in Ra-217 populated in the alpha decay of Th-221

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