α-decay of the new isotope 187Po:: Probing prolate structures beyond the neutron mid-shell at N=104

被引：38

作者：

Andreyev, AN

Antalic, S

Ackermann, D

Franchoo, S

Hessberger, FP

Hofmann, S

Huyse, M

Kojouharov, I

Kindler, B

Kuusiniemi, P

Lesher, SR

Lommel, B

Mann, R

Münzenberg, G

Nishio, K

Page, RD

Ressler, JJ

Streicher, B

Saro, S

Sulignano, B

Van Duppen, P

Wiseman, D

Wyss, R

机构：

[1] TRIUMF, Vancouver, BC V6T 2A3, Canada

[2] Comenius Univ, Dept Nucl Phys & Biophys, SK-84248 Bratislava, Slovakia

[3] Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany

[4] IPN, F-91405 Orsay, France

[5] Katholieke Univ Leuven, Inst Kern & Stralingsfys, B-3001 Heverlee, Belgium

[6] Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England

[7] Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada

[8] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

[9] Goethe Univ Frankfurt, Inst Phys, D-60054 Frankfurt, Germany

[10] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

[11] Royal Inst Technol, Dept Phys, S-10405 Stockholm, Sweden

来源：

PHYSICAL REVIEW C | 2006年 / 73卷 / 04期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1103/PhysRevC.73.044324

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：

The new neutron-deficient isotope Po-187 has been identified in the complete fusion reaction Ti-46+Sm-144 -> Po-187+3n at the velocity filter SHIP. Striking features of the Po-187 alpha decay are the strongly-hindered decay to the spherical ground state and unhindered decay to a surprisingly low-lying deformed excited state at 286 keV in the daughter nucleus Pb-183. Based on the potential energy surface calculations, the Po-187 ground state and the 286 keV excited state in Pb-183 were interpreted as being of prolate origin. The systematic deviation of the alpha-decay properties in the lightest odd-A Po isotopes relative to the smooth behavior in the even-A neighbors is discussed. Improved data for the decay of Bi-187(m,g) were also obtained.

引用

页数：8

共 41 条

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