Triaxiality and Exotic Rotations at High Spins in 134Ce

Petrache, C. M.; Guo, S.; Ayangeakaa, A. D.; Garg, U.; Matta, J. T.; Nayak, B. K.; Patel, D.; Carpenter, M. P.; Chiara, C. J.; Janssens, R. V. F.; Kondev, F. G.; Lauritsen, T.; Seweryniak, D.; Zhu, S.; Ghugre, S. S.; Palit, R.

doi:10.1103/PhysRevC.93.064305

Title: Triaxiality and Exotic Rotations at High Spins in ¹³⁴Ce

Abstract

High-spin states in Ce-134 have been investigated using the Cd-116(Ne-22,4n) reaction and the Gammasphere array. The level scheme has been extended to an excitation energy of similar to 30 MeV and spin similar to 54 (h) over bar. Two new dipole bands and four new sequences of quadrupole transitions were identified. Several new transitions have been added to a number of known bands. One of the strongly populated dipole bands was revised and placed differently in the level scheme, resolving a discrepancy between experiment and model calculations reported previously. Configurations are assigned to the observed bands based on cranked Nilsson-Strutinsky calculations. A coherent understanding of the various excitations, both at low and high spins, is thus obtained, supporting an interpretation in terms of coexistence of stable triaxial, highly deformed, and superdeformed shapes up to very high spins. Rotations around different axes of the triaxial nucleus, and sudden changes of the rotation axis in specific configurations, are identified, further elucidating the nature of high-spin collective excitations in the A = 130 mass region.

Authors:

Petrache, C. M. ^[1]; Guo, S. ^[1]; Ayangeakaa, A. D. ^[2]; Garg, U. ^[2]; Matta, J. T. ^[2]; Nayak, B. K. ^[2]; Patel, D. ^[2]; Carpenter, M. P. ^[3]; Chiara, C. J. ^[4]; Janssens, R. V. F. ^[3]; Kondev, F. G. ^[3]; Lauritsen, T. ^[3]; Seweryniak, D. ^[3]; Zhu, S. ^[3]; Ghugre, S. S. ^[5]; Palit, R. ^[6]

CNRS/IN2P3. Univ. Paris (France)
Univ. of Notre Dame, IN (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Maryland, College Park, MD (United States)
UGC-DAE Consortium for Science Research, Kolkata (India)
Tata Inst. of Fundamental Research, Mumbai (India); Univ. of Notre Dame, IN (United States)

Publication Date:: Mon Jun 06 00:00:00 EDT 2016

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

Sponsoring Org.:: National Science Foundation (NSF); USDOE Office of Science (SC), Nuclear Physics (NP)

OSTI Identifier:: 1339560

Alternate Identifier(s):: OSTI ID: 1256130

Grant/Contract Number:: AC02-06CH11357; FG02-94ER40834

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review C, Nuclear Physics

Additional Journal Information:: Journal Volume: 93; Journal Issue: 6; Journal ID: ISSN 0556-2813

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats


                    Petrache, C. M., Guo, S., Ayangeakaa, A. D., Garg, U., Matta, J. T., Nayak, B. K., Patel, D., Carpenter, M. P., Chiara, C. J., Janssens, R. V. F., Kondev, F. G., Lauritsen, T., Seweryniak, D., Zhu, S., Ghugre, S. S., and Palit, R. Triaxiality and Exotic Rotations at High Spins in 134Ce.  United States: N. p., 2016. 
Web.  doi:10.1103/PhysRevC.93.064305.

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                    Petrache, C. M., Guo, S., Ayangeakaa, A. D., Garg, U., Matta, J. T., Nayak, B. K., Patel, D., Carpenter, M. P., Chiara, C. J., Janssens, R. V. F., Kondev, F. G., Lauritsen, T., Seweryniak, D., Zhu, S., Ghugre, S. S., & Palit, R. Triaxiality and Exotic Rotations at High Spins in 134Ce.  United States.  https://doi.org/10.1103/PhysRevC.93.064305

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                    Petrache, C. M., Guo, S., Ayangeakaa, A. D., Garg, U., Matta, J. T., Nayak, B. K., Patel, D., Carpenter, M. P., Chiara, C. J., Janssens, R. V. F., Kondev, F. G., Lauritsen, T., Seweryniak, D., Zhu, S., Ghugre, S. S., and Palit, R. Mon .  
"Triaxiality and Exotic Rotations at High Spins in 134Ce".  United States.  https://doi.org/10.1103/PhysRevC.93.064305.  https://www.osti.gov/servlets/purl/1339560.

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@article{osti_1339560,

  title        = {Triaxiality and Exotic Rotations at High Spins in 134Ce},

  author       = {Petrache, C. M. and Guo, S. and Ayangeakaa, A. D. and Garg, U. and Matta, J. T. and Nayak, B. K. and Patel, D. and Carpenter, M. P. and Chiara, C. J. and Janssens, R. V. F. and Kondev, F. G. and Lauritsen, T. and Seweryniak, D. and Zhu, S. and Ghugre, S. S. and Palit, R.},

  abstractNote = {High-spin states in Ce-134 have been investigated using the Cd-116(Ne-22,4n) reaction and the Gammasphere array. The level scheme has been extended to an excitation energy of similar to 30 MeV and spin similar to 54 (h) over bar. Two new dipole bands and four new sequences of quadrupole transitions were identified. Several new transitions have been added to a number of known bands. One of the strongly populated dipole bands was revised and placed differently in the level scheme, resolving a discrepancy between experiment and model calculations reported previously. Configurations are assigned to the observed bands based on cranked Nilsson-Strutinsky calculations. A coherent understanding of the various excitations, both at low and high spins, is thus obtained, supporting an interpretation in terms of coexistence of stable triaxial, highly deformed, and superdeformed shapes up to very high spins. Rotations around different axes of the triaxial nucleus, and sudden changes of the rotation axis in specific configurations, are identified, further elucidating the nature of high-spin collective excitations in the A = 130 mass region.},

  doi          = {10.1103/PhysRevC.93.064305},

  journal      = {Physical Review C, Nuclear Physics},

  number       = 6,

  volume       = 93,

  place        = {United States},

  year         = {Mon Jun 06 00:00:00 EDT 2016},

  month        = {Mon Jun 06 00:00:00 EDT 2016}

}

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Works referencing / citing this record:

Highly deformed bands in Nd nuclei: New results and consistent interpretation within the cranked Nilsson-Strutinsky formalism
journal, November 2019

Petrache, C. M.; Lv, B. F.; Astier, A.
Physical Review C, Vol. 100, Issue 5
DOI: 10.1103/physrevc.100.054319

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Title: Triaxiality and Exotic Rotations at High Spins in 134Ce

Abstract

Citation Formats

Lifetimes of the yrast states of even Ce isotopes journal, November 1977

Two neutron-dominated 10+ states in 134Ce journal, December 1980

Study of the level structure in 134Ce journal, April 1984

Prolate deformation of isomeric states in 134Ce and 142Sm journal, November 1986

Magnetic rotation and shape mixing in Ce 134 journal, January 2004

Non-yrast states of Ce populated in -decay journal, June 2000

Highly deformed and triaxial structures in 134 Ce journal, March 1999

High-spin yrast states in the γ -soft nuclei 135 Pr and 134 Ce journal, October 2011

Evidence for Multiple Chiral Doublet Bands in Ce 133 journal, April 2013

Transverse Wobbling in Pr 135 journal, February 2015

The coexistence of the intruder , superdeformed and terminating bands in the A ∼ 135 mass region journal, October 1996

Tilted axis rotation, candidates for chiral bands, and wobbling motion in 138 Nd journal, October 2012

Switch from short-axis to intermediate-axis rotation in 138 Nd journal, November 2013

Multiple triaxial bands in Nd 138 journal, February 2015

High-spin spectroscopy of 140 Nd journal, July 2013

Shape evolution and magnetic rotation in 141Nd journal, April 2015

Exotic rotations and triaxiality in Nd nuclei journal, October 2015

Triaxial bands in Ce 133 journal, August 1996

In-beam spectroscopy of medium- and high-spin states in Ce 133 journal, May 2016

Termination of rotational bands: disappearance of quantum many-body collectivity journal, December 1999

Rotational bands and particle-hole excitations at very high spin journal, March 1985

Calculating the nuclear mass in the very high angular momentum regime journal, July 2006

Gradual loss of collectivity in rotational bands in the A ∼ 110 (Z ⩾ 50, N ∼ 60) mass region journal, August 1995

The GAMMASPHERE journal, December 1990

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

Background subtraction from in-beam HPGe coincidence data sets journal, July 1995

Isotropic gates in large gamma detector arrays versus angular distributions journal, November 1997

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

Probing sd − fp cross-shell interactions via terminating configurations in Sc 42 , 43 journal, May 2007

Electric quadrupole interaction of Ce isomers in tin journal, December 1983

Higher Order Corrections to the Cranking Model journal, May 1965

Multiple dipole bands at prolate shapes in Nd 136 and their description through the projected shell model journal, June 1996

Magnetic moments at backbending and spectroscopy of 134Ce journal, July 1982

Competing mechanism for generating high spin excitations in γ-soft nuclei: the 136Nd case journal, April 1996

Multi-quasiparticle γ-band structure in neutron-deficient Ce and Nd isotopes journal, June 2009

Highly deformed bands in Nd nuclei: New results and consistent interpretation within the cranked Nilsson-Strutinsky formalism journal, November 2019

Title: Triaxiality and Exotic Rotations at High Spins in ¹³⁴Ce

Lifetimes of the yrast states of even Ce isotopes
journal, November 1977

Two neutron-dominated 10+ states in 134Ce
journal, December 1980

Study of the level structure in 134Ce
journal, April 1984

Prolate deformation of isomeric states in 134Ce and 142Sm
journal, November 1986

Magnetic rotation and shape mixing in ${}^{134}{Ce}$
journal, January 2004

Non-yrast states of Ce populated in -decay
journal, June 2000

Highly deformed and triaxial structures in $^{134} Ce$
journal, March 1999

High-spin yrast states in the $γ$ -soft nuclei $^{135}$ Pr and $^{134}$ Ce
journal, October 2011

Evidence for Multiple Chiral Doublet Bands in ${}^{133}{Ce}$
journal, April 2013

Transverse Wobbling in ${}^{135}\Pr$
journal, February 2015

The coexistence of the intruder , superdeformed and terminating bands in the A ∼ 135 mass region
journal, October 1996

Tilted axis rotation, candidates for chiral bands, and wobbling motion in $^{138}$ Nd
journal, October 2012

Switch from short-axis to intermediate-axis rotation in $^{138}$ Nd
journal, November 2013

Multiple triaxial bands in ${}^{138}{Nd}$
journal, February 2015

High-spin spectroscopy of $^{140}$ Nd
journal, July 2013

Shape evolution and magnetic rotation in 141Nd
journal, April 2015

Exotic rotations and triaxiality in Nd nuclei
journal, October 2015

Triaxial bands in ${}^{133}{Ce}$
journal, August 1996

In-beam spectroscopy of medium- and high-spin states in ${}^{133}{Ce}$
journal, May 2016

Termination of rotational bands: disappearance of quantum many-body collectivity
journal, December 1999

Rotational bands and particle-hole excitations at very high spin
journal, March 1985

Calculating the nuclear mass in the very high angular momentum regime
journal, July 2006

Gradual loss of collectivity in rotational bands in the A ∼ 110 (Z ⩾ 50, N ∼ 60) mass region
journal, August 1995

The GAMMASPHERE
journal, December 1990

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

Background subtraction from in-beam HPGe coincidence data sets
journal, July 1995

Isotropic gates in large gamma detector arrays versus angular distributions
journal, November 1997

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

Probing $sd − fp$ cross-shell interactions via terminating configurations in ${}^{42, 43}{Sc}$
journal, May 2007

Electric quadrupole interaction of Ce isomers in tin
journal, December 1983

Higher Order Corrections to the Cranking Model
journal, May 1965

Multiple dipole bands at prolate shapes in ${}^{136}{Nd}$ and their description through the projected shell model
journal, June 1996

Magnetic moments at backbending and spectroscopy of 134Ce
journal, July 1982

Competing mechanism for generating high spin excitations in γ-soft nuclei: the 136Nd case
journal, April 1996

Multi-quasiparticle γ-band structure in neutron-deficient Ce and Nd isotopes
journal, June 2009

Highly deformed bands in Nd nuclei: New results and consistent interpretation within the cranked Nilsson-Strutinsky formalism
journal, November 2019