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

Journal Article · Thu Jan 01 00:00:00 EST 1976 · Phys. Rev., C, v. 13, no. 1, pp. 118-123

OSTI ID:4064253

Mateja, J F; Neal, G F; Goss, J D; Chagnon, P R; Browne, C P

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, Other Information: Orig. Receipt Date: 30-JUN-76
• Country of Publication: United States
• Language: English

Related Subjects

N68531* -Physics (Nuclear
Experimental)-Nuclear Properties & Reactions
39 <= A <= 58-Energy Levels & Transitions
N68551 -Physics (Nuclear
Experimental)-Nuclear Properties & Reactions
39 <= A <= 58-Nuclear Reactions & Scattering
642403*
*MANGANESE 57 BRANCHING RATIO- ENERGY LEVELS- ENERGY-LEVEL TRANSITIONS- MIXING RATIO- SPIN
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