The chiral bands built on a con guration with only protons in the transient backbending regime was also observed for the rst time in^(119)Cs^([1]).One newly observed band(Band 9)which is nearly degenerate to the stron...The chiral bands built on a con guration with only protons in the transient backbending regime was also observed for the rst time in^(119)Cs^([1]).One newly observed band(Band 9)which is nearly degenerate to the strongly-coupled g9=2[404]9=2^(+)band of 119Cs was identi ed.It exhibits a backbending similar to that of known band(Band 8),at nearly constant rotation frequency.展开更多
We have found that the excited energy from the ground state with 1f7=2 configuration to the first excited state with 2p3=2 configuration in 37S is obviously lower compared with that in nearby N=21 isotones 35Si, 39A...We have found that the excited energy from the ground state with 1f7=2 configuration to the first excited state with 2p3=2 configuration in 37S is obviously lower compared with that in nearby N=21 isotones 35Si, 39Ar and 41Ca (see Fig. 1, The insert indicates the relevant single-particle orbits of proton and neutron). This interesting phenomenon may result from the collapse of N=28 closure, which gives the sufficient valence space for collective deformation which can been revealed from the B(E2) value. Therefore, to obtain the B(E2), we perform the experiments for measuring the lifetime of the first excited state in 37S.展开更多
Lifetime measurements of low-lying excited states in 87Zr and 87Nb have been performed via and coincidences. The 124 MeV 32S beam was delivered from the Sector-Focusing Cyclotron (SFC) of the Heavy Ion R-esearch Facil...Lifetime measurements of low-lying excited states in 87Zr and 87Nb have been performed via and coincidences. The 124 MeV 32S beam was delivered from the Sector-Focusing Cyclotron (SFC) of the Heavy Ion R-esearch Facility in Lanzhou (HIRFL). The parent nuclei 87Nb and 87Mo were produced by the respective reactions 58Ni (32S, 3p) and 58Ni (32S, 2p1n), at a beam energy 100 MeV through the 8 m Al degrader.展开更多
The Rare-Isotope Beam(RIB)Physics Laboratory at IMP has made steady progress in 2022 in the following five aspects.1.Nuclear structure and reaction studies with intermediate-and low-energy RI beams.Measurements of cha...The Rare-Isotope Beam(RIB)Physics Laboratory at IMP has made steady progress in 2022 in the following five aspects.1.Nuclear structure and reaction studies with intermediate-and low-energy RI beams.Measurements of charge-changing cross-sections(CCCS)of^(30-36)P on a^(nat)C target were successfully performed at beam energies around 200-300 MeV/nucleon at the External Target Facility(ETF)of HIRFL to investigate the effect of the N=20 shell closure.展开更多
Stars with initial mass■8M_(sun)burn the carbon element after consuming most of its helium materials.The^(12)C+^(12)C fusion reaction is the primary reaction of the carbon burning process,producing magnesium and othe...Stars with initial mass■8M_(sun)burn the carbon element after consuming most of its helium materials.The^(12)C+^(12)C fusion reaction is the primary reaction of the carbon burning process,producing magnesium and other elements including neon,sodium and oxygen^([1]).展开更多
Lifetime measurements of low-lying excited states in^87Zr have been performed viaβ-γcoincidences.The 127 MeV^32S beam was delivered from the Sector-Focusing Cyclotron(SFC)of the Heavy Ion Research Facility in Lanzho...Lifetime measurements of low-lying excited states in^87Zr have been performed viaβ-γcoincidences.The 127 MeV^32S beam was delivered from the Sector-Focusing Cyclotron(SFC)of the Heavy Ion Research Facility in Lanzhou(HIRFL).The parent nuclei^87Nb were produced by the reaction 58Ni(32S,2p1n),at a beam energy 127 MeV through a 8 um Al degrader.A 200ug/cm^2 layer of 58Ni evaporated onto a 200ug/cm^2 thick carbon foil was employed as the target.After evaporation residues were separated from the projectile beams by the gas-filled recoil separator SHANS[1],the nuclei of interest 87Zr can be obtained with a higher purity and then were implanted into a 300um silicon detector.展开更多
基金China Scholarship Council(CSC)(201804910386)Academy of Finland under Finnish Centre of Excellence Programme(2012-2017)+8 种基金The EU 7th Framework Programme Project(262010)(ENSAR)United Kingdom Science and Technology Facilities Council,National Research Foundation of South Africa(116666,109134)French Ministry of Foreign A airs and Ministry of Higher Ed-ucation and Research,France(PHC PROTEA 42417SE)National Research,Development and Innovation Fund of Hungary(K128947)European Regional Development Fund(GINOP-2.3.3-15-2016-00034)Polish National Science Centre(NCN)(2013/10/M/ST2/00427)Swedish Research Council(2019-04880)National Natural Science Foundation of China(11505242,11305220,U1732139,11775274,11575255),use of germanium detectors from the GAMMAPOOL is acknowledgedI.K.was supported by National Research,Develop-ment and Innovation Oce-NKFIH(PD 124717)。
文摘The chiral bands built on a con guration with only protons in the transient backbending regime was also observed for the rst time in^(119)Cs^([1]).One newly observed band(Band 9)which is nearly degenerate to the strongly-coupled g9=2[404]9=2^(+)band of 119Cs was identi ed.It exhibits a backbending similar to that of known band(Band 8),at nearly constant rotation frequency.
文摘We have found that the excited energy from the ground state with 1f7=2 configuration to the first excited state with 2p3=2 configuration in 37S is obviously lower compared with that in nearby N=21 isotones 35Si, 39Ar and 41Ca (see Fig. 1, The insert indicates the relevant single-particle orbits of proton and neutron). This interesting phenomenon may result from the collapse of N=28 closure, which gives the sufficient valence space for collective deformation which can been revealed from the B(E2) value. Therefore, to obtain the B(E2), we perform the experiments for measuring the lifetime of the first excited state in 37S.
文摘Lifetime measurements of low-lying excited states in 87Zr and 87Nb have been performed via and coincidences. The 124 MeV 32S beam was delivered from the Sector-Focusing Cyclotron (SFC) of the Heavy Ion R-esearch Facility in Lanzhou (HIRFL). The parent nuclei 87Nb and 87Mo were produced by the respective reactions 58Ni (32S, 3p) and 58Ni (32S, 2p1n), at a beam energy 100 MeV through the 8 m Al degrader.
文摘The Rare-Isotope Beam(RIB)Physics Laboratory at IMP has made steady progress in 2022 in the following five aspects.1.Nuclear structure and reaction studies with intermediate-and low-energy RI beams.Measurements of charge-changing cross-sections(CCCS)of^(30-36)P on a^(nat)C target were successfully performed at beam energies around 200-300 MeV/nucleon at the External Target Facility(ETF)of HIRFL to investigate the effect of the N=20 shell closure.
基金Strategic Priority Research Program of Chinese Academy of Sciences(XDB34020200)National Key Research and Development program(MOST 2016YFA0400501)from Ministry of Science and Technology of China。
文摘Stars with initial mass■8M_(sun)burn the carbon element after consuming most of its helium materials.The^(12)C+^(12)C fusion reaction is the primary reaction of the carbon burning process,producing magnesium and other elements including neon,sodium and oxygen^([1]).
文摘Lifetime measurements of low-lying excited states in^87Zr have been performed viaβ-γcoincidences.The 127 MeV^32S beam was delivered from the Sector-Focusing Cyclotron(SFC)of the Heavy Ion Research Facility in Lanzhou(HIRFL).The parent nuclei^87Nb were produced by the reaction 58Ni(32S,2p1n),at a beam energy 127 MeV through a 8 um Al degrader.A 200ug/cm^2 layer of 58Ni evaporated onto a 200ug/cm^2 thick carbon foil was employed as the target.After evaporation residues were separated from the projectile beams by the gas-filled recoil separator SHANS[1],the nuclei of interest 87Zr can be obtained with a higher purity and then were implanted into a 300um silicon detector.
