Spin alignment and density matrix measurement in sup 28 Si + sup 12 C orbiting reaction

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6828055

Ray, A; Shapira, D; Halbert, M L; Gomez del Campo, J; Kim, H J ^[1]; Sullivan, J P ^[2]; Shivakumar, B; Mitchell, J ^[3]

---

1. Oak Ridge National Lab., TN (USA)
2. Texas A and M Univ., College Station, TX (USA). Cyclotron Inst.
3. Yale Univ., New Haven, CT (USA). Wright Nuclear Structure Lab.

Gamma-ray angular correlations have been measured for the strongly damped reactions {sup 12}C({sup 28}Si,{sup 12}C){sup 28}Si between {theta}{sub cm} = (120{degree} {minus} 160{degree}) for E{sub cm} = 43.5 and 48 MeV. We find that the density matrices for the {sup 12}C(2{sub 1}{sup +}) and {sup 28}Si states are almost diagonal with respect to the direction of motion of the outgoing particle. The measured density matrices and spin alignments are consistent with the picture of formation of a long-lived dinuclear complex undergoing orbiting, bending and wriggling motions, but not with those obtained from statistical compound nucleus or sticking model calculations. 17 refs., 2 figs., 1 tab.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC05-84OR21400; FG05-87ER40361
• OSTI ID: 6828055
• Report Number(s): CONF-9005221-2; ON: DE90012172
• Country of Publication: United States
• Language: English

Related Subjects

651320* -- Nuclear Properties & Reactions
A=6-19
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR CORRELATION
CARBON 12 TARGET
CHARGED-PARTICLE REACTIONS
COMPOUND NUCLEI
CORRELATION FUNCTIONS
CORRELATIONS
CROSS SECTIONS
DATA
DENSITY MATRIX
EXPERIMENTAL DATA
FUNCTIONS
GAMMA SPECTRA
HEAVY ION REACTIONS
INFORMATION
MATRICES
NUCLEAR REACTIONS
NUMERICAL DATA
ORIENTATION
SILICON 28 REACTIONS
SPECTRA
SPIN ORIENTATION
TARGETS