Excitation functions of inelastic and transfer channels in {sup 12}C+{sup 12}C around E{sub c.m.}=32.5 MeV

Journal Article · Sat Mar 01 04:00:00 EST 1997 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.55.1312· OSTI ID:513478

Szilner, S; Basrak, Z ^[1]; Freeman, R M; Haas, F; Morsad, A; Beck, C ^[1]

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1. Centre de Recherche Nucleaires and Universite Louis Pasteur, F-67037 Strasbourg Cedex 2 (France)

A prominent and wide resonance centered at E{sub c.m.}=32.5 MeV has recently been found in the (0{sub 2}{sup +},0{sub 2}{sup +}) inelastic channel of the {sup 12}C+{sup 12}C reaction. It has been suggested that it corresponds to a 6{alpha}-particle-chain state in {sup 24}Mg. In the present work we study {sup 12}C+{sup 12}C excitation functions between center-of-mass energies of 30 and 35 MeV in steps of 250 keV for weakly populated outgoing channels. We present the inelastic channels to the states above the {alpha}-particle decay threshold, (0{sub 1}{sup +},0{sub 2}{sup +}), (0{sub 1}{sup +},3{sub 1}{sup {minus}}), and (0{sub 1}{sup +},4{sub 1}{sup +}), and the one- and two-nucleon transfer channels. In the inelastic and the transfer channels we observe correlated intermediate-width structures at E{sub c.m.}=31, 32.5, and 33.5 MeV, whose widths are appreciably smaller than the width measured in the (0{sub 2}{sup +},0{sub 2}{sup +}) channel. Our E{sub c.m.}=32.5 MeV angular distribution of the (0{sub 1}{sup +},0{sub 2}{sup +}) channel exhibits oscillatory behavior and, unlike that of the (0{sub 2}{sup +},0{sub 2}{sup +}) channel, does not display enhancement around {theta}{sub c.m.}=90{degree}. Data were collected via the kinematic coincidence technique. For data reduction we use a novel approach allowing for the extraction of results on nonbinary channels. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 513478
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 3 Vol. 55; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ALPHA PARTICLES
ANGULAR DISTRIBUTION
CARBON 12 REACTIONS
CARBON 12 TARGET
EXCITATION FUNCTIONS
INELASTIC SCATTERING
MEV RANGE 10-100
ONE-NUCLEON TRANSFER REACTIONS
RESONANCE SCATTERING
TRANSFER REACTIONS
TWO-NUCLEON TRANSFER REACTIONS
WIDTH