학술논문
LIFETIMES IN Sn$sup 120$, Ba$sup 138$ AND Ce$sup 14$$sup 0$
Document Type
Journal Article
Author
Source
Nuclear Physics (Netherlands) Divided into Nucl. Phys. A and Nucl. Phys. B; Vol: 48; Other Information: Orig. Receipt Date: 31-DEC-64
Subject
Language
English
ISSN
0029-5582
Abstract
The mean lives of two states in Sn/sup 120/ and Ba/sup 138/ were measured by time-to-pulse-height conversion. The value found for the 2.3-Mev level in Sn/sup 120/ is 8.24 plus or minus 0.23 nsec, which is in good agreement with two other recent measurements. For the 1.89-Mev level in Ba/sup 138/ the figure obtained is 3.13 plus or minus 0.11 nsec, 8 times longer than the single-particle estimate. The slowness of the transitions in Ce/sup 140/ and Ba/sup 138/ is accounted for by treating them as quasi-particle transitions and using data from the work of Kisslinger and Sorensen on the theory of pairing correlations. A simple view of these quasi-particle transitions is given. (auth)