Decoupled and semi-decoupled bands in Hg197 and Hg199

Negi, D.; Tandel, S. K.; Chauhan, P.; Chowdhury, P.; Janssens, R. V.  F.; Carpenter, M. P.; Khoo, T. L.; Kondev, F. G.; Lauritsen, T.; Lister, C. J.; Seweryniak, D.; Zhu, S.

doi:10.1103/PhysRevC.100.014329

Title: Decoupled and semi-decoupled bands in ${}^{197}{Hg}$ and ${}^{199}{Hg}$

Abstract

Here, the structure of decoupled positive-parity and semidecoupled negative-parity bands up to high spin in ^197,199Hg has been studied using multinucleon transfer reactions with the Gammasphere array. A positive-parity band in ¹⁹⁹Hg with the (vi_13/2)³ decoupled configuration that deexcites to levels in the negative-parity sequences is newly established. The semidecoupled sequences in both isotopes are extended to higher spin. Rotation-aligned angular momenta and crossing frequencies determined from experiment are in fair agreement with those from cranking calculations. Finally, a transition from oblate collective rotation at low spin to triaxial noncollective shapes at high spin is indicated.

Authors:

Negi, D. ^[1]; Tandel, S. K. ^[2]; Chauhan, P. ^[1]; Chowdhury, P. ^[3]; Janssens, R. V. F. ^[4]; Carpenter, M. P. ^[5]; Khoo, T. L. ^[5]; Kondev, F. G. ^[5]; Lauritsen, T. ^[5]; Lister, C. J. ^[6]; Seweryniak, D. ^[5]; Zhu, S. ^[5]

Univ. of Mumbai (India)
Univ. of Mumbai (India); Univ. of Massachusetts, Lowell, MA (United States)
Univ. of Massachusetts, Lowell, MA (United States)
Univ. of North Carolina, Chapel Hill, NC (United States); Duke Univ., Durham, NC (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
Univ. of Massachusetts, Lowell, MA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)

Publication Date:: 2019-07-31

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP)

OSTI Identifier:: 1560057

Alternate Identifier(s):: OSTI ID: 1545945

Grant/Contract Number:: AC02-06CH11357; FG02-94ER40848; FG02-94ER40834; FG02-97ER41033; FG02-97ER41041

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review C

Additional Journal Information:: Journal Volume: 100; Journal Issue: 1; Journal ID: ISSN 2469-9985

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats


                    Negi, D., Tandel, S. K., Chauhan, P., Chowdhury, P., Janssens, R. V.  F., Carpenter, M. P., Khoo, T. L., Kondev, F. G., Lauritsen, T., Lister, C. J., Seweryniak, D., and Zhu, S. Decoupled and semi-decoupled bands in Hg197 and Hg199.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevC.100.014329.

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                    Negi, D., Tandel, S. K., Chauhan, P., Chowdhury, P., Janssens, R. V.  F., Carpenter, M. P., Khoo, T. L., Kondev, F. G., Lauritsen, T., Lister, C. J., Seweryniak, D., & Zhu, S. Decoupled and semi-decoupled bands in Hg197 and Hg199.  United States.  https://doi.org/10.1103/PhysRevC.100.014329

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                    Negi, D., Tandel, S. K., Chauhan, P., Chowdhury, P., Janssens, R. V.  F., Carpenter, M. P., Khoo, T. L., Kondev, F. G., Lauritsen, T., Lister, C. J., Seweryniak, D., and Zhu, S. Wed .  
"Decoupled and semi-decoupled bands in Hg197 and Hg199".  United States.  https://doi.org/10.1103/PhysRevC.100.014329.  https://www.osti.gov/servlets/purl/1560057.

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@article{osti_1560057,

  title        = {Decoupled and semi-decoupled bands in Hg197 and Hg199},

  author       = {Negi, D. and Tandel, S. K. and Chauhan, P. and Chowdhury, P. and Janssens, R. V.  F. and Carpenter, M. P. and Khoo, T. L. and Kondev, F. G. and Lauritsen, T. and Lister, C. J. and Seweryniak, D. and Zhu, S.},

  abstractNote = {Here, the structure of decoupled positive-parity and semidecoupled negative-parity bands up to high spin in 197,199Hg has been studied using multinucleon transfer reactions with the Gammasphere array. A positive-parity band in 199Hg with the (vi13/2)3 decoupled configuration that deexcites to levels in the negative-parity sequences is newly established. The semidecoupled sequences in both isotopes are extended to higher spin. Rotation-aligned angular momenta and crossing frequencies determined from experiment are in fair agreement with those from cranking calculations. Finally, a transition from oblate collective rotation at low spin to triaxial noncollective shapes at high spin is indicated.},

  doi          = {10.1103/PhysRevC.100.014329},

  journal      = {Physical Review C},

  number       = 1,

  volume       = 100,

  place        = {United States},

  year         = {2019},

  month        = {7}

}

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https://doi.org/10.1103/PhysRevC.100.014329

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Figures / Tables:

FIG. 1: Level scheme of ¹⁹⁷Hg obtained from the present work. The widths of the arrows are proportional to the relative intensities of the γ rays. The levels and transitions marked red are newly established.

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Works referenced in this record:

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Figures / Tables found in this record:

FIG. 1 (p. 4)

TABLE I : Part 1 (p. 5)

TABLE 1: Part 2 (p. 6)

FIG. 2 (p. 8)

FIG. 3 (p. 9)

FIG. 4 (p. 10)

TABLE II : Part 1 (p. 10)

TABLE II: Part 2 (p. 12)

Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.

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Similar Records

Title: Decoupled and semi-decoupled bands in Hg 197 and Hg 199

Abstract

Citation Formats

Figures / Tables:

High-spin excitation modes in even Hg nuclei journal, October 1974

Rotation-aligned bands in Hg 196 journal, September 1983

Identification of high-spin states in the stable nucleus 195 Pt journal, July 2011

The high-spin structure of 158Er: A theoretical study journal, May 1990

High-spin states in even Hg nuclei and rotation alignment in Hg 198 journal, April 1977

Dynamical deformation of nuclei in deep-inelastic collisions: A gamma coincidence study of 130Te+275 MeV 64Ni and 208Pb+345 MeV 58Ni heavy ion reactions journal, January 2010

Nuclear structure of Pt 200 from in-beam conversion-electron and γ -ray spectroscopy journal, May 1988

High-spin negative-parity states in 200Hg from 200mAu decay and 198Pt(α, 2nγ) reaction spectroscopy journal, December 1972

Spectroscopy of195Hg and196Hg journal, September 1991

Higher Order Corrections to the Cranking Model journal, May 1965

Evidence for triaxial shapes in Pt nuclei journal, February 1976

Excitation of high-spin states in 190, 191, 192, 193, 194hg through (α, xn) reactions journal, August 1975

Detailed band structures in 189Hg and 190Hg journal, September 1994

High-spin negative parity states in doubly even Hg, Pt and Os nuclei journal, April 1974

Aligned bands coupled to different shapes in 186Hg journal, November 1983

Levels in Even-Even Hg 192 , Hg 194 , Hg 196 , and Hg 198 journal, October 1968

Collective Oblate Rotation at High Spins in Neutron-Rich Hf 180 journal, October 2008

Isomers and oblate rotation in Pt isotopes: Delineating the limit for collectivity at high spins journal, November 2015

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Identification of the missing rotation-aligned journal, February 1981

ESCL8R and LEVIT8R: Software for interactive graphical analysis of HPGe coincidence data sets journal, July 1995

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High-Spin States and Coriolis-Decoupled Bands in Hg 1 9 0 − 1 9 4 journal, April 1974

The triplets in 190–196Hg journal, April 1983

Use of DCO ratios for spin determination in γ-γ coincidence measurements journal, February 1989

Rotation-aligned isomer and oblate collectivity in Pt 196 journal, November 2015

Spectroscopy of 200Hg after incomplete fusion reaction journal, October 1999

Band crossings in weakly deformed 190Hg journal, August 1982

Structure of odd- A Pt isotopes along the line of stability journal, July 2019

Collective rotation and vibration in neutron-rich Hf 180 , 182 nuclei journal, March 2007

High-spin levels in Pt 191 and Pt 193 and the triaxial rotor model journal, January 1977

Interpretation of the 21-ns Isomer in Hg 190 as ( ν i 13 2 ) 2 from a g -Factor Measurement journal, September 1980

Investigation of level energies and B(E2) values for rotation-aligned bands in Hg isotopes journal, June 1978

High-spin structure of 190–194Hg and the cranked shell model journal, May 1986

Two-quasiparticle and rotation-aligned structures in 190Pt, 192Pt and 194Pt journal, May 1976

The GAMMASPHERE journal, December 1990

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Title: Decoupled and semi-decoupled bands in ${}^{197}{Hg}$ and ${}^{199}{Hg}$

High-spin excitation modes in even Hg nuclei
journal, October 1974

Rotation-aligned bands in ${}^{196}{Hg}$
journal, September 1983

Identification of high-spin states in the stable nucleus $^{195}$ Pt
journal, July 2011

The high-spin structure of 158Er: A theoretical study
journal, May 1990

High-spin states in even Hg nuclei and rotation alignment in ${}^{198}{Hg}$
journal, April 1977

Dynamical deformation of nuclei in deep-inelastic collisions: A gamma coincidence study of 130Te+275 MeV 64Ni and 208Pb+345 MeV 58Ni heavy ion reactions
journal, January 2010

Nuclear structure of ${}^{200}{Pt}$ from in-beam conversion-electron and γ -ray spectroscopy
journal, May 1988

High-spin negative-parity states in 200Hg from 200mAu decay and 198Pt(α, 2nγ) reaction spectroscopy
journal, December 1972

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journal, September 1991

Higher Order Corrections to the Cranking Model
journal, May 1965

Evidence for triaxial shapes in Pt nuclei
journal, February 1976

Excitation of high-spin states in 190, 191, 192, 193, 194hg through (α, xn) reactions
journal, August 1975

Detailed band structures in 189Hg and 190Hg
journal, September 1994

High-spin negative parity states in doubly even Hg, Pt and Os nuclei
journal, April 1974

Aligned bands coupled to different shapes in 186Hg
journal, November 1983

Levels in Even-Even ${Hg}^{192}$ , ${Hg}^{194}$ , ${Hg}^{196}$ , and ${Hg}^{198}$
journal, October 1968

Collective Oblate Rotation at High Spins in Neutron-Rich ${}^{180}{Hf}$
journal, October 2008

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journal, November 2015

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journal, February 1975

Identification of the missing rotation-aligned
journal, February 1981

ESCL8R and LEVIT8R: Software for interactive graphical analysis of HPGe coincidence data sets
journal, July 1995

Decoupled bands in odd-mass mercury isotopes
journal, July 1974

High-Spin States and Coriolis-Decoupled Bands in ${}^{190 - 194}{Hg}$
journal, April 1974

The triplets in 190–196Hg
journal, April 1983

Use of DCO ratios for spin determination in γ-γ coincidence measurements
journal, February 1989

Rotation-aligned isomer and oblate collectivity in ${}^{196}{Pt}$
journal, November 2015

Spectroscopy of 200Hg after incomplete fusion reaction
journal, October 1999

Band crossings in weakly deformed 190Hg
journal, August 1982

Structure of odd- $A$ Pt isotopes along the line of stability
journal, July 2019

Collective rotation and vibration in neutron-rich ${}^{180, 182}{Hf}$ nuclei
journal, March 2007

High-spin levels in ${}^{191}{Pt}$ and ${}^{193}{Pt}$ and the triaxial rotor model
journal, January 1977

Interpretation of the 21-ns Isomer in ${}^{190}{Hg}$ as ${(ν i_{\frac{13}{2}})}^{2}$ from a $g$ -Factor Measurement
journal, September 1980

Investigation of level energies and B(E2) values for rotation-aligned bands in Hg isotopes
journal, June 1978

High-spin structure of 190–194Hg and the cranked shell model
journal, May 1986

Two-quasiparticle and rotation-aligned structures in 190Pt, 192Pt and 194Pt
journal, May 1976

The GAMMASPHERE
journal, December 1990

Inelastic and transfer reactions in 92Mo+255 MeV 60Ni collisions studied by γγ coincidences
journal, November 1990

Non-axial deformations and the odd parity states in the even Pt and Hg isotopes
journal, March 1977