Observation of multiple doubly degenerate bands in 195Tl

T. Roy; G. Mukherjee; Md A. Asgar; S. Bhattacharyya; Soumik Bhattacharya; C. Bhattacharya; S. Bhattacharya; T. K. Ghosh; K. Banerjee; Samir Kundu; T. K. Rana; P. Roy; R. Pandey; J. Meena; A. Dhal; R. Palit; S. Saha; J. Sethi; Shital Thakur; B. S. Naidu; S. V. Jadav; R. Dhonti; H. Pai; A. Goswami

doi:10.1016/j.physletb.2018.06.033

Observation of multiple doubly degenerate bands in ¹⁹⁵Tl

T. Roy, G. Mukherjee^*, Md A. Asgar, S. Bhattacharyya, Soumik Bhattacharya, C. Bhattacharya, S. Bhattacharya, T. K. Ghosh, K. Banerjee, Samir Kundu, T. K. Rana, P. Roy, R. Pandey, J. Meena, A. Dhal, R. Palit, S. Saha, J. Sethi, Shital Thakur, B. S. NaiduS. V. Jadav, R. Dhonti, H. Pai, A. Goswami

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

The High-spin states in ¹⁹⁵Tl, populated through the ^185,187Re(¹³C, xn) fusion evaporation reaction at the beam energy of 75 MeV, were studied using the Indian National Gamma Array (INGA). More than 50 new γ transitions have been placed in the proposed level scheme which is extended up to the excitation energy of ≈ 5.6 MeV and spin=22.5ħ. Two pairs of degenerate bands based on two different quasi-particle configurations have been identified in this nucleus indicating the first observation of such bands in an odd-A nucleus in A∼190 region and signify the first evidence of multiple chiral bands in a nucleus in this region. The total Routhian surface calculations predict triaxial shapes for both the configurations and thereby, support the experimental observation. The importance of multiple neutron holes in the i_13/2 orbital and the stability of shapes for these two configurations have been discussed.

Original language	English
Pages (from-to)	768-772
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	782
DOIs	https://doi.org/10.1016/j.physletb.2018.06.033
Publication status	Published - 10 Jul 2018

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Roy, T., Mukherjee, G., Asgar, M. A., Bhattacharyya, S., Bhattacharya, S., Bhattacharya, C., Bhattacharya, S., Ghosh, T. K., Banerjee, K., Kundu, S., Rana, T. K., Roy, P., Pandey, R., Meena, J., Dhal, A., Palit, R., Saha, S., Sethi, J., Thakur, S., ... Goswami, A. (2018). Observation of multiple doubly degenerate bands in ¹⁹⁵Tl. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 782, 768-772. https://doi.org/10.1016/j.physletb.2018.06.033

@article{49fe003d31344d4280bb9574bd504881,

title = "Observation of multiple doubly degenerate bands in 195Tl",

abstract = "The High-spin states in 195Tl, populated through the 185,187Re(13C, xn) fusion evaporation reaction at the beam energy of 75 MeV, were studied using the Indian National Gamma Array (INGA). More than 50 new γ transitions have been placed in the proposed level scheme which is extended up to the excitation energy of ≈ 5.6 MeV and spin=22.5ħ. Two pairs of degenerate bands based on two different quasi-particle configurations have been identified in this nucleus indicating the first observation of such bands in an odd-A nucleus in A∼190 region and signify the first evidence of multiple chiral bands in a nucleus in this region. The total Routhian surface calculations predict triaxial shapes for both the configurations and thereby, support the experimental observation. The importance of multiple neutron holes in the i13/2 orbital and the stability of shapes for these two configurations have been discussed.",

keywords = "Doubly degenerate bands, Nuclear Structure, TRS calculation, γ-ray spectroscopy",

author = "T. Roy and G. Mukherjee and Asgar, \{Md A.\} and S. Bhattacharyya and Soumik Bhattacharya and C. Bhattacharya and S. Bhattacharya and Ghosh, \{T. K.\} and K. Banerjee and Samir Kundu and Rana, \{T. K.\} and P. Roy and R. Pandey and J. Meena and A. Dhal and R. Palit and S. Saha and J. Sethi and Shital Thakur and Naidu, \{B. S.\} and Jadav, \{S. V.\} and R. Dhonti and H. Pai and A. Goswami",

note = "Publisher Copyright: {\textcopyright} 2018 The Author(s)",

year = "2018",

month = jul,

day = "10",

doi = "10.1016/j.physletb.2018.06.033",

language = "English",

volume = "782",

pages = "768--772",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

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Roy, T, Mukherjee, G, Asgar, MA, Bhattacharyya, S, Bhattacharya, S, Bhattacharya, C, Bhattacharya, S, Ghosh, TK, Banerjee, K, Kundu, S, Rana, TK, Roy, P, Pandey, R, Meena, J, Dhal, A, Palit, R, Saha, S, Sethi, J, Thakur, S, Naidu, BS, Jadav, SV, Dhonti, R, Pai, H & Goswami, A 2018, 'Observation of multiple doubly degenerate bands in ¹⁹⁵Tl', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 782, pp. 768-772. https://doi.org/10.1016/j.physletb.2018.06.033

TY - JOUR

T1 - Observation of multiple doubly degenerate bands in 195Tl

AU - Roy, T.

AU - Mukherjee, G.

AU - Asgar, Md A.

AU - Bhattacharyya, S.

AU - Bhattacharya, Soumik

AU - Bhattacharya, C.

AU - Bhattacharya, S.

AU - Ghosh, T. K.

AU - Banerjee, K.

AU - Kundu, Samir

AU - Rana, T. K.

AU - Roy, P.

AU - Pandey, R.

AU - Meena, J.

AU - Dhal, A.

AU - Palit, R.

AU - Saha, S.

AU - Sethi, J.

AU - Thakur, Shital

AU - Naidu, B. S.

AU - Jadav, S. V.

AU - Dhonti, R.

AU - Pai, H.

AU - Goswami, A.

PY - 2018/7/10

Y1 - 2018/7/10

N2 - The High-spin states in 195Tl, populated through the 185,187Re(13C, xn) fusion evaporation reaction at the beam energy of 75 MeV, were studied using the Indian National Gamma Array (INGA). More than 50 new γ transitions have been placed in the proposed level scheme which is extended up to the excitation energy of ≈ 5.6 MeV and spin=22.5ħ. Two pairs of degenerate bands based on two different quasi-particle configurations have been identified in this nucleus indicating the first observation of such bands in an odd-A nucleus in A∼190 region and signify the first evidence of multiple chiral bands in a nucleus in this region. The total Routhian surface calculations predict triaxial shapes for both the configurations and thereby, support the experimental observation. The importance of multiple neutron holes in the i13/2 orbital and the stability of shapes for these two configurations have been discussed.

AB - The High-spin states in 195Tl, populated through the 185,187Re(13C, xn) fusion evaporation reaction at the beam energy of 75 MeV, were studied using the Indian National Gamma Array (INGA). More than 50 new γ transitions have been placed in the proposed level scheme which is extended up to the excitation energy of ≈ 5.6 MeV and spin=22.5ħ. Two pairs of degenerate bands based on two different quasi-particle configurations have been identified in this nucleus indicating the first observation of such bands in an odd-A nucleus in A∼190 region and signify the first evidence of multiple chiral bands in a nucleus in this region. The total Routhian surface calculations predict triaxial shapes for both the configurations and thereby, support the experimental observation. The importance of multiple neutron holes in the i13/2 orbital and the stability of shapes for these two configurations have been discussed.

KW - Doubly degenerate bands

KW - Nuclear Structure

KW - TRS calculation

KW - γ-ray spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=85049025309&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2018.06.033

DO - 10.1016/j.physletb.2018.06.033

M3 - Article

SN - 0370-2693

VL - 782

SP - 768

EP - 772

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Observation of multiple doubly degenerate bands in ¹⁹⁵Tl

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