PROPERTIES OF LOW-LYING LEVELS IN Sb$sup 12$$sup 1$
Journal Article
·
· Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
Resonance fluorescence in Sb/sup 121/ was observed with Te/sup 121/ as the source of the exciting gamma radiation. A comparison of the pulse-height distribution of the resonance scattered radiation with that of the incident radiation showed unambigeously that the 506- and the 576-kev gamma rays emitted in the decay of 17-day Te/sup 121/ are the ground-state transitions from two separate levels in Sb/sup 121/. The angular distribution of the resonance radiation was studied with the resonant gamma rays from a gaseous source of Te/ sup 121/. On the basis of this angular distribution, the most probable spin assignments are 3/2 for the 506-kev level, and 1/2 for the 576-kev level. The transition probabilities of these levels were determined using the centrifuge method of compensating for the recoil energy losses. Assuming a branching of GAMMA /sub O// GAMMA = 0.96, the partial width for the 576-kev E2 transition was found to be GAMMA /sub O/(576) = ( plus or minus .4 plus or minus 0.6) x 10/ sup -5/ ev. For the mixed M1 + E2 plus or minus 06-kev transition, using GAMMA /sub O// GAMMA = 0.90, the partial width was determined to be GAMMA /sub O/ (508) = (2.2 plus or minus 0.2) x 10/sup -4/ ev. While the single-particle model predicts the observed spin sequence, it fails to account for the observed transition probabilities. Wave functions obtained recently by Kisslinger and Sorensen, and representing a combination of quasiparticle and phonon excitations, predict the observed transition probabilities rather well. (auth)
- Research Organization:
- Franklin Inst., Swarthmore, Penna.
- NSA Number:
- NSA-18-001066
- OSTI ID:
- 4153023
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 132; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
LOW ENERGY NUCLEAR PHYSICS. Report 807-4. Annual Report No. 4, August 1, 1960-July 31, 1961
E2/Ml RATIOS IN THE ISOMERIC TRANSITIONS OF Te$sup 121$ AND Te$sup 123$, AND THE DECAY OF THE Te$sup 121$ ISOMERS TO Sb$sup 12$$sup 1$
SPIN AND PARITY ASSIGNMENTS TO THE Ep = 504 keV AND Ep = 506 keV RESONANCE LEVELS IN $sup 27$Al(p,$gamma$)$sup 28$Si
Technical Report
·
Thu Aug 31 00:00:00 EDT 1961
·
OSTI ID:4646222
E2/Ml RATIOS IN THE ISOMERIC TRANSITIONS OF Te$sup 121$ AND Te$sup 123$, AND THE DECAY OF THE Te$sup 121$ ISOMERS TO Sb$sup 12$$sup 1$
Journal Article
·
Sun Mar 22 23:00:00 EST 1964
· Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
·
OSTI ID:4073853
SPIN AND PARITY ASSIGNMENTS TO THE Ep = 504 keV AND Ep = 506 keV RESONANCE LEVELS IN $sup 27$Al(p,$gamma$)$sup 28$Si
Journal Article
·
Mon Aug 01 00:00:00 EDT 1960
· Physica
·
OSTI ID:4124252