Bandcrossing of magnetic rotation bands in {sup 137}Pr

Journal Article · Wed Aug 15 00:00:00 EDT 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.76.024321· OSTI ID:21061960

Agarwal, Priyanka; Kumar, Suresh; Jain, A K ^[1]; Singh, Sukhjeet; Malik, S S ^[2]; Sinha, Rishi Kumar; Dhal, Anukul ^[3]; Muralithar, S; Singh, R P; Madhavan, N; Kumar, Rakesh; Bhowmik, R K ^[4]; Pancholi, S C ^[4]; Chaturvedi, L ^[3]; Jain, H C ^[5]

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1. Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667 (India)
2. Department of Physics, Guru Nanak Dev University, Amritsar 143005 (India)
3. Department of Physics, Banaras Hindu University, Varanasi 221005 (India)
4. Inter-University Accelerator Center, New Delhi 110067 (India)
5. Tata Institute of Fundamental Research, Colaba, Mumbai 400 005 (India)

The odd mass nucleus {sup 137}Pr has been studied to high spins in order to investigate the magnetic rotation phenomenon in mass 130 region using the {sup 122}Sn({sup 19}F,4n){sup 137}Pr reaction at a beam energy of 80 MeV. A known {delta}I=1 band has been extended to J{sup {pi}}=47/2{sup -} with the addition of three new transitions. Directional Correlation of Oriented Nuclei (DCO) ratios and linear polarization measurements have been performed to assign the multipolarities of gamma transitions and the spins and parities of the energy levels in this band, now established as the M1 band. The combination of M1 transitions along with cross over E2 transitions have been observed in this band for the first time. The experimentally deduced B(M1)/B(E2) ratios show a decrease with increasing spin after band-crossing suggesting magnetic rotation. TAC calculations for the 3qp: {pi}h{sub 11/2} x {nu}(h{sub 11/2}){sup -2} configuration reproduce the experimental observations in the lower spin part of the {delta}I=1 band and the 5qp: {pi}h{sub 11/2}(g{sub 7/2}){sup 2} x {nu}(h{sub 11/2}){sup -2} configuration reproduces the {delta}I=1 band at higher spins; the crossing of the bands based on the two configuration leads to a back-bending also. Theoretical calculations also support a magnetic rotation nature for both the configurations.

• OSTI ID: 21061960
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 76, Issue 2; Other Information: DOI: 10.1103/PhysRevC.76.024321; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR CORRELATION
BACKBENDING
E2-TRANSITIONS
ENERGY LEVELS
FLUORINE 19 REACTIONS
M1-TRANSITIONS
MEV RANGE
MULTIPOLARITY
NUCLEAR STRUCTURE
ORIENTED NUCLEI
PARITY
POLARIZATION
PRASEODYMIUM 137
ROTATION
SPIN
TIN 122
TIN 122 TARGET