Search for Chiral and Reflected Symmetry Breakings in Atomic Nucleus

WANG Shouyu

doi:10.11804/NuclPhysRev.34.03.357

Spontaneous symmetry breaking is a fundamental concept in nature. Chiral Symmetry Breaking and reflection-asymmetry in nuclei has been a subject of intensive experimental and theoretical investigation. Two pairs of positive-and negative-parity doublet bands together with eight strong electric dipole transitions linking their yrast positive-and negative-parity bands have been identified in ⁷⁸Br by means of in-beam gamma-ray spectroscopy techniques. These four rotational bands are suggested as multiple chiral doublet bands with octupole correlations. This observation indicates that nuclear chirality can be robust against the octupole correlations. It is of highly scientific interest to search for the chirality-parity quartet bands in nucleus with both stable triaxial and octupole deformations.

Search for Chiral and Reflected Symmetry Breakings in Atomic Nucleus

Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, and Institute of Space Sciences, Shandong University, Weihai 264209, Shandong, China

Funds: National Natural Science Foundation of China (11545011, 11461141001, U1432119)

Received Date: 2016-12-07

Rev Recd Date: 2017-03-20

Publish Date: 2017-07-18

Key words:

Abstract: Spontaneous symmetry breaking is a fundamental concept in nature. Chiral Symmetry Breaking and reflection-asymmetry in nuclei has been a subject of intensive experimental and theoretical investigation. Two pairs of positive-and negative-parity doublet bands together with eight strong electric dipole transitions linking their yrast positive-and negative-parity bands have been identified in ⁷⁸Br by means of in-beam gamma-ray spectroscopy techniques. These four rotational bands are suggested as multiple chiral doublet bands with octupole correlations. This observation indicates that nuclear chirality can be robust against the octupole correlations. It is of highly scientific interest to search for the chirality-parity quartet bands in nucleus with both stable triaxial and octupole deformations.

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[1]	FRAUENDORF S, MENG J. Nucl Phys A, 1997, 617(2):131.
[2]	STAROSTA K, KOIKE T, CHIARA C J, et al. Phys Rev Lett, 2001, 86(6):971.
[3]	ZHU S, GARG U, NAYAK B K, et al. Phys Rev Lett, 2003, 91(13):132501.
[4]	VAMAN C, FOSSAN D B, KOIKE T, et al. Phys Rev Lett, 2004, 92(3):032501.
[5]	WANG S Y, QI B, LIU L, et al. Phys Lett B, 2011, 703(1):40.
[6]	JOSHI P, JENKINS D G, RADDON P M, et al. Phys Lett B, 2004, 595(1):135.
[7]	TIMÁR J, JOSHI P, STAROSTA K, et al. Phys Lett B, 2004, 598(3):178.
[8]	ZHU S J, HAMILTON J H, RAMAYYA A V, et al. The European Physical Journal A-Hadrons and Nuclei, 2005, 25(1):459.
[9]	TONEV D, YAVAHCHOVA M S, GOUTEV N, et al. Phys Rev Lett, 2014, 112(5):052501.
[10]	LIEDER E O, LIEDER R M, BARK R A, et al. Phys Rev Lett, 2014, 112(20):202502.
[11]	RATHER N, DATTA P, CHATTOPADHYAY S, et al. Phys Rev Lett, 2014, 112(20):202503.
[12]	KOIKE T, STAROSTA K, CHIARA C J, et al. Phys Rev C, 2001, 63(6):061304.
[13]	BARK R A, BAXTER A M, BYRNE A P, et al. Nucl Phys A, 2001, 691(3):577.
[14]	KOIKE T, STAROSTA K, CHIARA C J, et al. Phys Rev C, 2003, 67(4):044319.
[15]	RAINOVSKI G, PAUL E S, CHANTLER H J, et al. Journal of Physics G:Nuclear and Particle Physics, 2003, 29(12):2763.
[16]	WANG S Y, LIU Y Z, KOMATSUBARA T, et al. Phys Rev C, 2006, 74(1):017302.
[17]	ZHAO Y X, KOMATSUBARA T, MA Y J, et al. Chin Phys Lett, 2009, 26(8):082301.
[18]	MA K Y, LU J B, YANG D, et al. Phys Rev C, 2012, 85(3):037301.
[19]	LAWRIE E A, VYMERS P A, LAWRIE J J, et al. Phys Rev C, 2008, 78(2):021305.
[20]	MASITENG P L, LAWRIE E A, RAMASHIDZHA T M, et al. Phys Rev B, 2013, 719(1):83.
[21]	CHASMAN R R. Phys Rev B, 1980, 96(1):7.
[22]	BUTLER P A, NAZAREWICZ W. Reviews of Modern Physics, 1996, 68(2):349.
[23]	GAFFNEY L P, BUTLER P A, SCHECK M, et al. Nature, 2013, 497(2):199.
[24]	BARK R A, LIPOGLAVSEK M, MALIAGE S M, et al. Journal of Physics G:Nuclear and Particle Physics, 2005, 31(10):S1747.
[25]	GAL J, HEGYESI G, MOLNAR J, et al. Nucl Instr Meth A, 2004, 516(2-3):502.
[26]	LIU C, WANG S Y, BARK R A, et al. Phys Rev Lett, 2016, 116(11):112501.
[27]	KUTI I, CHEN Q B, TIMÁR J, et al. Phys Rev Lett, 2014, 113(3):032501.
[28]	DORING J, JOHNS G D, RILEY M A, et al. Phys Rev C, 1998, 57(6):2912.
[29]	XU C, LI X Q, MENG J, et al. Phys Rev C, 2015, 91(6):061303(R).
[30]	SCHWENGNER R, WINTER G, DORING J, et al. Z Phys A, 1987, 326:287.

Search for Chiral and Reflected Symmetry Breakings in Atomic Nucleus

doi: 10.11804/NuclPhysRev.34.03.357

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