CARBON RADIOACTIVITY OF FR-221 AND RA-221 AND THE HINDERED DECAY OF EXOTIC ODD-A EMITTERS

被引：28
作者：
BONETTI, R
CHIESA, C
GUGLIELMETTI, A
MIGLIORINO, C
MONTI, P
PASINETTI, AL
RAVN, HL
机构：
[1] UNIV MILAN,DIPARTIMENTO FIS,I-20122 MILAN,ITALY
[2] CERN,DIV PPE,CH-1211 GENEVA 23,SWITZERLAND
[3] INFN,MILAN,ITALY
来源：
NUCLEAR PHYSICS A | 1994年 / 576卷 / 01期
关键词：
FR-221; RA-221(C-12); (C-14); MEASURED CLUSTER DECAY T(1/2); BRANCHING RATIO RELATIVE TO ALPHA-DECAY; SOLID-STATE NUCLEAR TRACK DETECTORS; ONLINE SOURCE PREPARATION;
D O I：
10.1016/0375-9474(94)90736-6
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：
By using glass detectors in 4pi geometry we measured the spontaneous emission of carbon clusters from two sources of Fr-221 and 221(Ra + Fr) produced at the on-line mass-separator ISOLDE at CERN, and obtained branching ratios lambda(cl)/lambda(alpha) = (8.79 +/- 1.14) x 10(-13) and (1.15 +-/ 0.91) x 10(-12) for Fr-221 and Ra-221 respectively. Such results exhibit a one-order-of-magnitude hindrance in respect to even-even father nuclei having the same penetrability for C-14 emission.
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页码：21 / 28
页数：8
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