Triaxial shape coexistence and new aligned band in {sup 178}Os

Journal Article · Sun Nov 15 00:00:00 EST 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.054319· OSTI ID:21296491

Kumar, Rajesh; Govil, I M ^[1]; Dhal, A; Chaturvedi, L ^[2]; Praharaj, C R ^[3]; Rath, A K ^[4]; Kumar, G Kiran ^[5]; Basu, S K ^[6]; Chakraborty, A; Krishichayan,; Mukhopadhyay, S; Pattabiraman, N S; Ghugre, S S; Sinha, A K ^[7]

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1. Department of Physics, Panjab University, Chandigarh-160014 (India)
2. Department of Physics, Banaras Hindu University, Varanasi-220115, Uttar Pradesh (India)
3. Institute of Physics, Bhubaneshwar-751005 (India)
4. Department of Physics, Sambalpur University, Jyoti Vihar, Burla, Sambalpur-768019, Orissa (India)
5. Department of Physics, Maharaja Sayajirao University, Vadodara, Baroda 390002 (India)
6. Variable Energy Cyclotron Center, Bidhan Nagar, Calcutta-700064 (India)
7. UGC-DAE Consortium for Scientific Research, Calcutta Centre, Sector III LB-8, Bidhan Nagar, Kolkata-700098 (India)

High spin states in {sup 178}Os were studied by means of {sup 165}Ho({sup 20}Ne,p6n){sup 178}Os fusion evaporation reaction at a beam energy of 150 MeV, using a clover detector array. Several new transitions belonging to {sup 178}Os were placed in a level scheme and a new aligned rotational band was observed in addition to earlier known bands. Spin-parity assignments for most of the proposed levels were made using the deduced directional correlation orientation and polarization measurements for the de-exciting transitions. Experimental results are compared with the projected angular momentum deformed Hartree-Fock model calculations and cranked Woods-Saxon model calculations. This nucleus is predicted to be prolate deformed in the ground state but the {gamma}-softness at higher excitation is revealed by the cranked Woods-Saxon model and the geometrical asymmetric model calculations.

• OSTI ID: 21296491
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 80, Issue 5; Other Information: DOI: 10.1103/PhysRevC.80.054319; (c) 2009 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
ASYMMETRY
BEAMS
COMPUTERIZED SIMULATION
EXCITATION
GROUND STATES
HARTREE-FOCK METHOD
HEAVY ION FUSION REACTIONS
HIGH SPIN STATES
HOLMIUM 165 TARGET
MEV RANGE 100-1000
NEON 20 REACTIONS
NEUTRON EMISSION
OSMIUM 178
PARITY
POLARIZATION
PROTON-EMISSION DECAY
ROTATIONAL STATES
SPIN
WOODS-SAXON POTENTIAL