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Shape change induced by g 9/2 rotational alignment in 84,86Mo

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Abstract

Neutron-deficient ZN nuclei 84,86Mo have been investigated using pairing-deformation self-consistent cranked shell model calculations up to spin I > 20th. Our calculations are in good agreement with the experimental data, indicating γ-soft triaxial shapes at low rotational frequency and well-deformed triaxial-oblate shapes at high rotational frequency for both nuclei. The shape change is due to the alignments of the g 9/2 protons and g 9/2 neutrons.

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References

  1. Dudek J, Nazarewicz W, Rowley N. Shape coexistence effects and superdeformation in 84Zr. Phys Rev C, 1987, 35: 1489–1501

    Article  ADS  Google Scholar 

  2. Gross C J, Gelletly W, Bently M A, et al. Systematic behavior of the neutron-deficient molybdenum nuclei. Phys Rev C, 1991, 44: R2253–R2256

    Article  ADS  Google Scholar 

  3. Andgren K, Ganioglu E, Cederwall B, et al. Low-spin collective behavior in the transitional nuclei 86,88Mo. Phys Rev C, 2007, 76: 014307

    Article  ADS  Google Scholar 

  4. Singh P, Pillay R G, Sheikh J A, et al. Spectroscopy of high spin states in 92Mo and 90Mo. Phys Rev C, 1992, 45: 1261–1271

    ADS  Google Scholar 

  5. Sienko T A, Lister C J, Kaye R A. γ vibrational band and quasiparticle excitations in 80Sr. Phys Rev C, 2003, 67: 064311

    Article  ADS  Google Scholar 

  6. Tabor S L, Dring C J, Holcomb J W, et al. Transition strengths and multiple band structure in 82Sr. Phys Rev C, 1994, 49: 730–742

    Article  ADS  Google Scholar 

  7. Mǎrginean N, Bucurescu D, Rossi A C, et al. Delayed alignments in the N = Z nuclei 84Mo and 88Ru. Phys Rev C, 2002, 65: 051303

    Article  ADS  Google Scholar 

  8. Sun Y, Sheikh J A. Anomalous rotational alignment in N = Z nuclei and residual neutron-proton interaction. Phys Rev C, 2001, 64: 031302

    Article  ADS  Google Scholar 

  9. Palit R, Sheikh J A, Sun Y, et al. Projected shell model study for the yrast-band structure of the proton-rich mass-80 nuclei. Nucl Phys A, 2001, 686: 141–162

    Article  ADS  Google Scholar 

  10. Rudolph D, Gross C J, Akovali Y A, et al. Shell-model influence in the rotational nucleus 86Mo. Phys Rev C, 1996, 54: 117–124

    Article  ADS  Google Scholar 

  11. Bohr A, Mottelson B R. Nuclear Structure. New York: Benjamin, 1975. Vol. II

    Google Scholar 

  12. Frauendorf S, Meng J. Tilted rotation of triaxial nuclei. Nucl Phys A, 1997, 617: 131–147

    Article  ADS  Google Scholar 

  13. Bengtsson R, Frisk H, May F R, et al. Signature inversion—A finger print of triaxiality. Nucl Phys A, 1984, 415: 189–214

    Article  ADS  Google Scholar 

  14. Narimatsu K, Shimizu Y R, Shizuma T. γ-tunneling calculations for the decays of the K isomers in the Hf, W, Os region. Nucl Phys A, 1996, 601: 69–88

    Article  ADS  Google Scholar 

  15. Yeoh E Y, Zhu S J, Hamilton J H, et al. Identification of a quasiparticle band in very neutron-rich 104Zr. Phys Rev C, 2010, 82: 027302

    Article  ADS  Google Scholar 

  16. Ding H B, Zhu S J, Hamilton J H, et al. Identification of band structures and proposed one- and two-phonon γ-vibrational bands in 105Mo. Phys Rev C, 2006, 74: 054301

    Article  ADS  Google Scholar 

  17. Andrejtscheff W, Petkov P. Asymmetry versus symmetric quadrupole deformation in even-even nuclei with 94 ⩽ A ⩾ 192. Phys Rev C, 1993, 48: 2531–2533

    Article  ADS  Google Scholar 

  18. Andrejtscheff W, Petkov P. Evidence for strong ground-state shape asymmetry in even germanium and selenium isotops. Phys Lett B, 1994, 329: 1–4

    Article  ADS  Google Scholar 

  19. Satula W, Wyss R, Magierski P. The Lipkin-Nogami formalism for the cranked mean field. Nucl Phys A, 1994, 578: 45–61

    Article  ADS  Google Scholar 

  20. Ćwiok S, Dudek J, Nazarewicz W, et al. Single-particle energies, wave functions, quadrupole moments and g-factors in an axially deformed woods-saxon potential with applications to the two-centre-type nuclear problems. Comput Phys Commun, 1987, 46: 379–399

    Article  ADS  Google Scholar 

  21. Pardhan H C, Nogami Y, Low J. Study of approximations in the nuclear pairing-force problem. Nucl Phys A, 1973, 201: 357–368

    Article  ADS  Google Scholar 

  22. Nazarewicz W, Riley MA, Garrett J D. Equilibrium deformations and excitations energies of single-quasiproton band heads of rare-earth nuclei. Nucl Phys A, 1990, 512: 61–96

    Article  ADS  Google Scholar 

  23. Sakamoto H, Kisimoto T. Origin of the multipole pairing interactions. Phys Lett B, 1990, 245: 321–324

    Article  ADS  Google Scholar 

  24. Satula W, Wyss R. Coherence of nucleonic motion in superdeformed nuclei: Towards an understanding of identical bands. Phys Rev C, 1994, 50: 2888–2892

    Article  ADS  Google Scholar 

  25. Xu F R, Satula W, Wyss R. Quadrupole pairing interaction and signature inversion. Nucl Phys A, 2000, 669: 119–134

    Article  ADS  Google Scholar 

  26. Möller P, Nix J R. Nuclear pairing models. Nucl Phys A, 1992, 536: 20–60

    Article  ADS  Google Scholar 

  27. Xu F R, Wyss R, Walker P M. Mean-field and blocking effects on oddeven mass differences and rotational motion of nuclei. Phys Rev C, 1999, 60: 051301

    Article  ADS  Google Scholar 

  28. Goodman A L. Proton-neutron pairing in Z = N nuclei with A = 76−96. Phys Rev C, 1999, 60: 014311

    Article  ADS  Google Scholar 

  29. Regan P H, Xu F R, Walker P M, et al. Structure of the doubly midshell nucleus 17060 Dy104. Phys Rev C, 2002, 65: 037302

    Article  ADS  Google Scholar 

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Correspondence to FuRong Xu.

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Liu, X., Shi, Y. & Xu, F. Shape change induced by g 9/2 rotational alignment in 84,86Mo. Sci. China Phys. Mech. Astron. 54, 1811 (2011). https://doi.org/10.1007/s11433-011-4462-2

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  • DOI: https://doi.org/10.1007/s11433-011-4462-2

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