Structure in E1 strength distribution built on the 15.1 MeV T=1 state in {sup 12}C
Journal Article
·
· Physical Review. C, Nuclear Physics
- Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085 (India)
- Tata Institute of Fundamental Research, Mumbai 400 005 (India)
The measurement of the giant electric dipole resonance built on the isobaric analog state in the self-conjugate even-even nucleus {sup 12}C is reported covering a wide excitation energy range. This is done using the {sup 11}B(p,{gamma}) reaction leading to the 15.1 MeV T=1 state in {sup 12}C over a proton energy range of 7 to 24.5 MeV. Two resonances of 1.3 and 2 MeV widths are observed at excitation energies of 24.4 and 28.8 MeV superimposed on a smoothly varying cross section. The {gamma} transitions from both the resonances are assigned E1 multipolarity. The structured T=0 component of the E1 strength distribution is thus very different from that built on the first T=1 state in the neighboring nucleus {sup 14}N and those built on the ground states of {sup 12}C and {sup 14}C.
- OSTI ID:
- 21189958
- Journal Information:
- Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 77; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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