Alpha decay of the new isotopes 188,189Po

被引：56

作者：

Andreyev, AN

Ackermann, D

Cagarda, P

Gerl, J

Hessberger, F

Hofmann, S

Huyse, M

Keenan, A

Kettunen, H

Kleinböhl, A

Lavrentiev, A

Leino, M

Lommel, B

Matos, M

Münzenberg, G

Moore, C

O'Leary, CD

Page, RD

Reshitko, S

Saro, S

Schlegel, C

Schaffner, H

Taylor, M

Van Duppen, P

Weissman, L

Wyss, R

机构：

[1] Univ Louvain, Inst Kern & Stralingsfys, B-3001 Louvain, Belgium

[2] Gesell Schwerionenforsch Inst Darmstadt, D-6100 Darmstadt, Germany

[3] Comenius Univ, Dept Nucl Phys, Bratislava, Slovakia

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

[5] Univ Jyvaskyla, Dept Phys, SF-40351 Jyvaskyla, Finland

[6] Joint Inst Nucl Res, Flerov Lab Nucl React, Dubna 141980, Russia

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

来源：

EUROPEAN PHYSICAL JOURNAL A | 1999年 / 6卷 / 04期

关键词：

D O I：

10.1007/s100500050359

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：

New neutron-deficient isotopes Po-188,Po-189 have been produced in the complete fusion reaction of Cr-52 ions with a Nd-142 target at the velocity filter SHIP. The evaporation residues were separated in-flight and subsequently identified on the basis of alpha - gamma and alpha-conversion electron coincidence measurements and of alpha-alpha position and time correlations. In Po-189 a ground state to ground state alpha decay with E-alpha 1 = 7540(20) keV, T-1/2=5(1) ms and two fine structure alpha-decays at E-alpha 2=7264(15) keV and E-alpha 3=7316(15) keV have been observed. In Po-188 (T-1/2 = 400(-150)(+200) mu s) a ground state to ground state alpha decay at E alpha=7915(25) keV and a fine structure alpha decay at E-alpha=7350(40) keV have been found. Improved data on the alpha-decay of Bi-189 were obtained.

引用

页码：381 / 385

页数：5

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