Observation of the exotic nucleus 145Tm via its direct proton decay

被引：87

作者：

Batchelder, JC ^{[1
]}

Bingham, CR

Rykaczewski, K

Toth, KS

Davinson, T

McKenzie, JA

Woods, PJ

Ginter, TN

Gross, CJ

McConnell, JW

Zganjar, EF

Hamilton, JH

Walters, WB

Baktash, C

Greene, J

Mas, JF

Milner, WT

Paul, SD

Shapira, D

Xu, XJ

Yu, CH

机构：

[1] Oak Ridge Associated Univ, UNIRIB, Oak Ridge, TN 37831 USA

[2] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[3] Univ Tennessee, Knoxville, TN 37996 USA

[4] Warsaw Univ, PL-00681 Warsaw, Poland

[5] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland

[6] Vanderbilt Univ, Nashville, TN 37235 USA

[7] Oak Ridge Inst Sci & Educ, Oak Ridge, TN 37831 USA

[8] Louisiana State Univ, Baton Rouge, LA 70803 USA

[9] Univ Maryland, College Pk, MD 20742 USA

[10] Argonne Natl Lab, Argonne, IL 60439 USA

[11] Inst Modern Phys, Lanzhou 730000, Peoples R China

[12] Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW C | 1998年 / 57卷 / 03期

关键词：

D O I：

10.1103/PhysRevC.57.R1042

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Proton emission from Tm-145 was observed for the first time via the Mo-92(Ni-58,p4n) reaction, using the Holifield Radioactive Ion Beam Facility Recoil Mass Spectrometer in conjunction with a double-sided Si strip detector at the focal plane. The measured energy of the emitted proton is 1.728(10) MeV and its half-life is 3.5(10) mu s, the shortest ever observed for ground-state proton radioactivity. When compared to the calculated WKB half-life for an l=5 transfer, the spectroscopic factor is 0.51(16), which is consistent with the value of 0.64 calculated via the BCS approximation for a spherical nucleus. Also, the half-life of Cs-113 was determined with a greater precision than previously available to be 16.7(7) mu sec.

引用

页码：R1042 / R1046

页数：5

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