Chinese Physics C > 1995, Vol. 19 > Issue(3): 193-202

First Study of EC/β⁺Decay Schemes for Neutron-Deficient Isotopes¹⁵³Er and¹⁵⁷Yb

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou, 7300001 Department of Modern Physics, Lanzhou University, Lanzhou 730000

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Abstract：
¹⁵³Er and ¹⁵⁷Yb were produced via xu fusion-evaporation reaction by irradiation of ¹⁴²Nd and ¹⁴⁷Sm with ¹⁶O, respectively. A He-jet recoil tape transport system, X-γ and γ-γ coincidence measurements were employed to separate and identify the reaction products and to study the EC/β ⁺decay of ¹⁵³Er and ¹⁵⁷Yb. The EC/β ⁺decay schemes of ¹⁵³Er and ¹⁵⁷Yb have been proposed for the first time, from which a new three qussi-particle state and two new single proton states have been assigned to ¹⁵³Ho, and a new isomer and a new rotational band have been assigned to ¹⁵⁷Tm. According to systematic behaviour of the low-laying energy levels for odd holmium and odd thulium isotopes with N=82-102, it can be seen that the change from spherical to deformed shapes of nuclear ground states in the two isotope chains appears between N=86 and 88.

References

[1]

J.D.Bowman,R.E.EPPley,E.K.Hyde,Phys.Rev.,C25（1982）941.[2]E.Hagberg,P.G.Hansen,J.C.Hardy et al.,Nucl.Phys.,A293（1977）1.[3]M.A.Lee,Nucl.Data.Sheets,60（1990）513.[4]R.Neugart et al.,5thInt.Conf.on Nuclei far from Stability,Rosseau Lake,Canada,p.126（1988）.[5]M.A.Lee,Nucl.Data Sheets,60（1990）509.[6]M.H.Rafailovich,O.C.Kistner,A.W.Sunyar et al.,Phys.Rev.,C30（1984）169.[7]C.Ekstrom,L.Robertsson et al.,Z.Phys.,A316（1984）239.[8]G.Andi,A.H.Wapstra,Nucl.Phys.,A565（1993）1.[9]R.Kossakowski,J.Jastzebski,P.Rymuza et al.,Phys.Rev.,C32（1985）1612.[10]M.A.RILEY,C.Baktash,Y.A.Ellis-Akovali et al.,Argonne National Laboratory Report,ANL-PHY-88-2,1988.[11]K.S.Toth,C.R.Bingham,W.D.Schmidt-ott,Phys.Rev.,C10（1974）1550.[12]L.Kh.Batist et al.,Izv.Akad.Nauk SSSR Ser.Fiz.,46（1982）2200.[13]袁双贵、徐树威、张学谦等，核技术，16（8）（1993）475.[14]徐树威、王以好、罗亦孝等，He-jet带传输及X-γ（t）符合测量装置和153Er（EC+β+）衰变新γ的测定，核技术，（1995）待发表。[15]XuShuwei,XieYuanxiang,PanQiangyan et al.,The（EC+β+）decay of 153Er,Z.Phys.,A350（1994）187.[16]XuShuwei,XieYuanxiang,PanQiangyan et al.,（EC+β+）decay of 157Yb,Phys.Rev.,C50,No6（1994）.[17]N.B.Gove,M.J.Martin,Nucl.Data Tables,10（1971）206.[18]R.B.Firestone,J.M.Nitchke,P.A.Wilmarth et al.,Phys.Rev.,C39（1989）219.[19]K.S.Tothetal.,Phys.Rev.,C44（1991）1868.[20]R.Barden,A.Plochocki,D.Schardt et al.,Z.Phys.,A329（1988）11.[21]W.Meczynski,K.Zuber,R.Broda et al.,Programme and Abstracts of 6th Int.Conf.on Nucl.far from Stability,PE34（1992）[22]P.C.Sood and R.K.Sheline,Atomic Data and Nucl ear Data Tables,43（1989）259.[23]K.S.Toth et al.,Phys.Rev.,C32（1985）342.[24]G.D.Alkhazov,A.E.Barzakh,I.Ya.Chubukov et al.,Nucl.Phys.,A477（1988）37.[25]A.K.Jain,R.K.Sheline,P.C.Sood et al.,Rev.Mod.Phys,62（1990）393.[26]P.Kleibeinz,B.Rubio,M.Oyawa et al.,Z.Phys.,A322（1985）705.[27]M.O.Kortelahtic,K.S.Toth,K.S.Vierinen et al.,Phys.Rev.,C39（1989）636.[28]A.V.Potempa et al.,Izv.Akad.Nauk.SSSR Ser.Fiz.,54（1990）852.

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[16]	Sang Jianping,Liu Yong. Microscopic Investigation of High-Spin States for Even-Even Nuclei (Part 2): Application to isotones¹⁵⁴Dy,¹⁵⁶Er and¹⁵⁸Yb. Chinese Physics C, 1994, 18(S4): 407-414.
[17]	Sang Jianping,Liu Yong. Microscopic Investigation of High-Spin States for Even-Even Nuclei(Ⅱ) Application to isotones¹⁵⁴Dy,¹⁵⁶Er and¹⁵⁸Yb. Chinese Physics C, 1994, 18(11): 1020-1026.
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[19]	ZHU Sheng-Jiang,MA Wen-Chao. LEVEL STRUCTURE OF¹⁵³Dy IN HIGH SPIN STATES AND SHAPE CHANGES WITH N AND I IN Dy NUCLEI. Chinese Physics C, 1990, 14(12): 1103-1109.
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Xu Shuwei, Xie Yuanxiang, Pan Qiangyan, Zhang Juping, Zhang Xueqian, Wang Yihao, Ge Yuanxiu, Yin Xijin, Wang Chunfang, Zhang Tianmei, Liu Zhong, Guo Bing, Luo Yixiao, Xing Zheng and Chen Xingqu. First Study of EC/β ⁺Decay Schemes for Neutron-Deficient Isotopes ¹⁵³Er and ¹⁵⁷Yb[J]. Chinese Physics C, 1995, 19(3): 193-202.

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Received: 1900-01-01
Revised: 1900-01-01

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

First Study of EC/β⁺Decay Schemes for Neutron-Deficient Isotopes¹⁵³Er and¹⁵⁷Yb

Corresponding author:Xu Shuwei,

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou, 7300001 Department of Modern Physics, Lanzhou University, Lanzhou 730000

Received Date:1900-01-01

Accepted Date:1900-01-01

Available Online:1995-03-05

Abstract:¹⁵³Er and¹⁵⁷Yb were produced via xu fusion-evaporation reaction by irradiation of¹⁴²Nd and¹⁴⁷Sm with¹⁶O, respectively. A He-jet recoil tape transport system, X-γ and γ-γ coincidence measurements were employed to separate and identify the reaction products and to study the EC/β⁺decay of¹⁵³Er and¹⁵⁷Yb. The EC/β⁺decay schemes of¹⁵³Er and¹⁵⁷Yb have been proposed for the first time, from which a new three qussi-particle state and two new single proton states have been assigned to¹⁵³Ho, and a new isomer and a new rotational band have been assigned to¹⁵⁷Tm. According to systematic behaviour of the low-laying energy levels for odd holmium and odd thulium isotopes with N=82-102, it can be seen that the change from spherical to deformed shapes of nuclear ground states in the two isotope chains appears between N=86 and 88.

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First Study of EC/β⁺Decay Schemes for Neutron-Deficient Isotopes¹⁵³Er and¹⁵⁷Yb

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