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Unbound isobaric analog states in /sup 53/Mn: The reactions /sup 52/Cr(/sup 3/He, d)/sup 53/Mn and /sup 52/Cr(/sup 3/He, dp)/sup 52/Cr

Journal Article · · Phys. Rev., C; (United States)
OSTI ID:7175234
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The /sup 52/Cr(/sup 3/He, d)/sup 53/Mn reaction investigated at 25 MeV incident energy with a split pole spectrometer was used to populate highly excited analog states in /sup 53/Mn. Fifty-two levels between 6.9 and 12.0 MeV excitation energy were observed in /sup 53/Mn. The main components of the T/sub greater-than/2p/sub 3/2/, 2p/sub 1/2/, 1f/sub 5/2/, and 1g/sub 3/2/ single-particle strengths were identified. Angular distributions of transitions to 38 unbound levels in /sup 53/Mn have been extracted and analyzed with distorted-wave Born approximation and Gamov functions (as form factors for the transferred proton) to yield the absolute spectroscopic strength. An appreciable amount of the missing 2p/sub 3/2/, 2p/sub 1/2/, and 1f/sub 5/2/ proton T/sub less-than/ strengths is observed in /sup 53/Mn between 7.0 and 8.5 MeV whereas a small fraction of the 1g/sub 9/2/ and 2d/sub 5/2/ single-particle orbitals appears between 7.0 and 12 MeV excitation energy. The /sup 52/Cr(/sup 3/He, dp)/sup 52/Cr reaction was performed at 24 MeV incident energy using a triplet of magnetic quadrupole lenses. The angular correlations of the emitted protons were measured in coincidence using method II of Litherland and Ferguson with zero degree detection of deuteron groups. Spins, population parameters, and branching ratios of proton partial widths to the ground and excited states of the target were determined for 14 unbound levels in /sup 53/Mn from the analysis of the angular correlation data. These two experiments provide a rather complete description of the spectroscopic properties of the analog of the levels of /sup 53/Cr up to 5.0 MeV excitation energy. A comparison is made with the previous (/sup 3/He, d), (p, ..gamma..), (p, p), and (d, p) results on the same target. Components of the /sup 53/Cr parent states which consist of a neutron coupled to an excited state of the /sup 52/Cr nucleus are also determined. (AIP)

Research Organization:
Institut de Physique Nucleaire, 91406 Orsay, France
OSTI ID:
7175234
Journal Information:
Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 14:3; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

651523* -- Nuclear Properties & Reactions
A=39-58
Experimental-- Energy Levels & Transitions-- (-1987)
651525 -- Nuclear Properties & Reactions
A=39-58
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
BETA DECAY RADIOISOTOPES
BORN APPROXIMATION
BRANCHING RATIO
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CHROMIUM 52
CHROMIUM ISOTOPES
DECAY
DEUTERONS
DIRECT REACTIONS
DWBA
ELECTRON CAPTURE RADIOISOTOPES
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
HELIUM 3 REACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MANGANESE 53
MANGANESE ISOTOPES
MEV RANGE
MEV RANGE 10-100
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
PARTICLE PROPERTIES
RADIOISOTOPES
SPIN
STABLE ISOTOPES
STRIPPING
TRANSFER REACTIONS
YEARS LIVING RADIOISOTOPES