Lifetime measurements and deformed states in $sup 41$Ca
The Doppler-shift attenuation method has been applied to measure the mean lives of levels in $sup 41$Ca. States were populated using the $sup 40$Ca(d,p)$sup 41$Ca reaction at E/sub d/ = 3 MeV, and protons emerging from the reaction were detected near 180$sup 0$ relative to the beam. $gamma$ rays were detected in coincidence with the protons using a 65 cm$sup 3$ Ge(Li) detector placed successively at angles of 53$sup 0$, 90$sup 0$, and 140$sup 0$. Values or limits were obtained for the lifetimes of 39 levels in $sup 41$Ca. There is a serious disagreement between some of the lifetime values measured in the present experiment and those reported in a previous work. Accurate excitation energies and the decay scheme were also determined. Information from the lifetimes and decay scheme has been used to make spin assignments or restrictions to a number of levels in $sup 41$Ca. The electromagnetic transition strengths determined from the present lifetime measurements and a previous measurement of $gamma$-ray angular correlations have been compared to the predictions of two models of the negative-parity spectrum of $sup 41$Ca. In addition, an interpretation of part of the positive-parity spectrum has been developed using the strong coupling model. This calculation includes the effects of the Coriolis term in the Hamiltonian which mixes rotational bands, and the calculated excitation energies, transition rates, and pickup spectroscopic factors have been compared with experiment.
- Research Organization:
- Physics Department, University of Pennsylvania, Philadelphia, Pennsylvania 19174
- NSA Number:
- NSA-33-004374
- OSTI ID:
- 4156199
- Journal Information:
- Phys. Rev., C, v. 12, no. 4, pp. 1212-1226, Journal Name: Phys. Rev., C, v. 12, no. 4, pp. 1212-1226; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BRANCHING RATIO-- CORIOLIS FORCE-- ENERGY LEVELS-- ENERGY-LEVEL TRANSITIONS-- LIFETIME-- PARITY-- ROTATIONAL STATES-- SPECTROSCOPIC FACTORS-- SPIN-- STRONG-COUPLING MODEL
CALCIUM 40-- DEUTERON REACTIONS-- MEV RANGE 01-10-- PROTONS-- STRIPPING
N68531* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
39 <= A <= 58--Energy Levels & Transitions