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Low-lying levels of $sup 57$Mn from the $sup 54$Cr($alpha$,p) reaction

Journal Article · · Phys. Rev., C, v. 13, no. 1, pp. 118-123
OSTI ID:4064253
; ; ; ;
Proton energy spectra from the $sup 54$Cr($alpha$,p)$sup 57$Mn reaction at 15, 21, and 24 MeV and at several angles have been measured with the 100-cm broad-range spectrograph. Both NaI(Tl) and Ge(Li) detectors have been used to study $gamma$ rays, in coincidence with protons in a particle detector, from the same reaction. From the spectrograph measurements, the ground-state Q value is found to be -4308+-8 keV. Excited levels have been found at 84.1+-1.0, 851.1+- 1.0, 1059.2+-2.0, 1073.8+-2.0, 1227.1+-1.0, 1376.5+-1.3, 2188.2+-1.1, and 2234.3+- 1.7 keV. Ten $gamma$-ray transitions have been observed. From particle-$gamma$ coincidence and angular-correlation measurements the spins of some levels can be limited as follows: 84 keV, 3/2-7/2; 851 keV, 3/2 or 5/2; 1059 keV, 1/2-5/2. Probable spin assignments for these three levels suggested on the basis of cross- section and relative transition-strength considerations are (7/2), (3/2), and (1/ 2), respectively. Other tentative spin assignments, and the comparison of $sup 57$Mn with other odd Mn isotopes, are discussed. (AIP)
Research Organization:
Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556
NSA Number:
NSA-33-027648
OSTI ID:
4064253
Journal Information:
Phys. Rev., C, v. 13, no. 1, pp. 118-123, Journal Name: Phys. Rev., C, v. 13, no. 1, pp. 118-123; ISSN PRVCA
Country of Publication:
United States
Language:
English

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*MANGANESE 57 BRANCHING RATIO-- ENERGY LEVELS-- ENERGY-LEVEL TRANSITIONS-- MIXING RATIO-- SPIN
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ALPHA REACTIONS-- ANGULAR CORRELATION-- CHROMIUM 54-- CHROMIUM 54 TARGET-- COINCIDENCE SPECTROMETRY-- ENERGY SPECTRA-- GAMMA RADIATION-- MEV RANGE 10-100-- PROTONS-- Q-VALUE-- STRIPPING-- THREE- NUCLEON TRANSFER REACTIONS
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39 <= A <= 58--Energy Levels & Transitions
N68551 --Physics (Nuclear
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39 <= A <= 58--Nuclear Reactions & Scattering