The ^8Li（p, d）^7 Li reaction plays an important role in the inhomogeneous Big Bang nucleosynthesis and in the seed-nuclide production phase for the r-process. For the first time, its angular distribution at backward...The ^8Li（p, d）^7 Li reaction plays an important role in the inhomogeneous Big Bang nucleosynthesis and in the seed-nuclide production phase for the r-process. For the first time, its angular distribution at backward angles was measured in inverse kinematics at Ec.m.=4.0 MeV by using an ^8Li secondary beam. The result of measurement includes the contributions of ^8Li（p, d0）^7Li and ^8Li（p, d1）^7Li^＊. The ^8Li（p, d0）^7Li component is estimated to be 40%-58% in the mixture angular distribution by analysing the measured result.展开更多
Angular distribution of the^(6)He(d,n)^(7)Li reaction at E_(c.m.)=9.1 MeV is measured in inverse kinematics for the first time.The proton spectroscopic factors for the ground and first excited states of^(7)Li are deri...Angular distribution of the^(6)He(d,n)^(7)Li reaction at E_(c.m.)=9.1 MeV is measured in inverse kinematics for the first time.The proton spectroscopic factors for the ground and first excited states of^(7)Li are derived by using the distorted wave Born approximation analysis.The astrophysical rates of^(6)He(p,γ)^(7)Li reaction are then deduced and fitted with an expression of REACLIB.展开更多
Angular distribution of the 12C（6He, 7Li）llB transfer reaction is measured with a secondary 6He beam of 36.4 MeV for the first time. The experimental angular distribution is well reproduced by the distorted-wave Bor...Angular distribution of the 12C（6He, 7Li）llB transfer reaction is measured with a secondary 6He beam of 36.4 MeV for the first time. The experimental angular distribution is well reproduced by the distorted-wave Born approxima- tion （DWBA） calculation. The success of the present experiment shows that it is feasible to measure one-nucleon transfer reaction on a light nucleus target with the secondary beam facility of the 1-11-13 tandem accelerator at China Institute of Atomic Energy （CIAE）, Beijing.展开更多
The elastic resonance scattering of ^12C＋p has been studied in inverse kinematics via a novel thicktarget method at GIRAFFE facility of HI-13 tandem accelerator laboratory, Beijing. The recoil protons weremeasured by...The elastic resonance scattering of ^12C＋p has been studied in inverse kinematics via a novel thicktarget method at GIRAFFE facility of HI-13 tandem accelerator laboratory, Beijing. The recoil protons weremeasured by a AE-E counter telescope based on a large area double-sided silicon strip detector at laboratoryangles around θ0 = 15^o. The excitation function for ^12C（p,p） elastic scattering has been obtained over a wideenergy range of Ec.m. =0.31-3.45 MeV, which was explained quite well by the R-matrix calculation with known resonance parameters of the first three levels in ^13N nucleus. Thus it is demonstrated that the present setup can be directly applied to the study of elastic resonance scattering with secondary radioactive beams.展开更多
The deep-level traps induced by charged defects at the grain boundaries(GBs)of polycrystalline organic-inorganic halide perovskite(OIHP)films serve as major recombination centres,which limit the device performance.Her...The deep-level traps induced by charged defects at the grain boundaries(GBs)of polycrystalline organic-inorganic halide perovskite(OIHP)films serve as major recombination centres,which limit the device performance.Herein,we incorporate specially designed poly(3-aminothiophenol)-coated gold(Au@PAT)nanoparticles into the perovskite absorber,in order to examine the influence of plasmonic resonance on carrier dynamics in perovskite solar cells.Local changes in the photophysical properties of the OIHP films reveal that plasmon excitation could fill trap sites at the GB region through photo-brightening,whereas transient absorption spectroscopy and density functional theory calculations correlate this photo-brightening of trap states with plasmon-induced interfacial processes.As a result,the device achieved the best efficiency of 22.0%with robust operational stability.Our work provides unambiguous evidence for plasmon-induced trap occupation in OIHP and reveals that plasmonic nanostructures may be one type of efficient additives to overcome the recombination losses in perovskite solar cells and thin-film solar cells in general.展开更多
基金Supported by the National Basic Research Programme of China under Grant No 2007CB815003, the National Natural Science Foundation of China under Grant Nos 10675173 and 10705053. The authors thank the staff of the HI-13 tandem accelerator for their technical support during the experiment.
文摘The ^8Li（p, d）^7 Li reaction plays an important role in the inhomogeneous Big Bang nucleosynthesis and in the seed-nuclide production phase for the r-process. For the first time, its angular distribution at backward angles was measured in inverse kinematics at Ec.m.=4.0 MeV by using an ^8Li secondary beam. The result of measurement includes the contributions of ^8Li（p, d0）^7Li and ^8Li（p, d1）^7Li^＊. The ^8Li（p, d0）^7Li component is estimated to be 40%-58% in the mixture angular distribution by analysing the measured result.
基金Supported by the National Basic Research Program of China under Grant No 2007CB815003the National Natural Science Foundation of China under Grant Nos 10675173,10975193,11021504,10720101076,11021504 and 10735100.
文摘Angular distribution of the^(6)He(d,n)^(7)Li reaction at E_(c.m.)=9.1 MeV is measured in inverse kinematics for the first time.The proton spectroscopic factors for the ground and first excited states of^(7)Li are derived by using the distorted wave Born approximation analysis.The astrophysical rates of^(6)He(p,γ)^(7)Li reaction are then deduced and fitted with an expression of REACLIB.
基金Supported by the National Basic Research Program of China under Grant No 2007CB815003, the National Natural Science Foundation of China under Grant Nos 10675173 10735100 and 10705053.
文摘Angular distribution of the 12C（6He, 7Li）llB transfer reaction is measured with a secondary 6He beam of 36.4 MeV for the first time. The experimental angular distribution is well reproduced by the distorted-wave Born approxima- tion （DWBA） calculation. The success of the present experiment shows that it is feasible to measure one-nucleon transfer reaction on a light nucleus target with the secondary beam facility of the 1-11-13 tandem accelerator at China Institute of Atomic Energy （CIAE）, Beijing.
基金supported by the National Natural Science Foundation of China (12265017 and 12247205)Yunnan Fundamental Research Projects (202201BE070001-009, 202101AU070043, 202201AV070003 and 202101AS070018)+1 种基金Yunnan Province Computational Physics and Applied Science, Technology Innovation TeamYunnan Ten Thousand Talents Plan Young & Elite Talents Project。
基金Supported by National Natural Science Foundation of China (10445004, 10575136, 10735100)Major State Basic Research Development Program (2007CB815003)
文摘The elastic resonance scattering of ^12C＋p has been studied in inverse kinematics via a novel thicktarget method at GIRAFFE facility of HI-13 tandem accelerator laboratory, Beijing. The recoil protons weremeasured by a AE-E counter telescope based on a large area double-sided silicon strip detector at laboratoryangles around θ0 = 15^o. The excitation function for ^12C（p,p） elastic scattering has been obtained over a wideenergy range of Ec.m. =0.31-3.45 MeV, which was explained quite well by the R-matrix calculation with known resonance parameters of the first three levels in ^13N nucleus. Thus it is demonstrated that the present setup can be directly applied to the study of elastic resonance scattering with secondary radioactive beams.
基金This work was supported by the National Natural Science Foundation of China(Grants 51863013 and 61874052)K.Y.thanks the financial support of Excellent Young Foundation of Jiangxi Province(Grant 20192BCB23009)+3 种基金the Hong Kong Scholars programme(XJ2016048)P.D.and T.S.thank the financial support of the Grant agency of the Czech Republic(number 20-01673S)This work was also supported by the Hong Kong Polytechnic University(G-YZ98)the Research Grants Council of Hong Kong(GRF Grant number PolyU152140/19E and CRF Grant number C5037-18G).
文摘The deep-level traps induced by charged defects at the grain boundaries(GBs)of polycrystalline organic-inorganic halide perovskite(OIHP)films serve as major recombination centres,which limit the device performance.Herein,we incorporate specially designed poly(3-aminothiophenol)-coated gold(Au@PAT)nanoparticles into the perovskite absorber,in order to examine the influence of plasmonic resonance on carrier dynamics in perovskite solar cells.Local changes in the photophysical properties of the OIHP films reveal that plasmon excitation could fill trap sites at the GB region through photo-brightening,whereas transient absorption spectroscopy and density functional theory calculations correlate this photo-brightening of trap states with plasmon-induced interfacial processes.As a result,the device achieved the best efficiency of 22.0%with robust operational stability.Our work provides unambiguous evidence for plasmon-induced trap occupation in OIHP and reveals that plasmonic nanostructures may be one type of efficient additives to overcome the recombination losses in perovskite solar cells and thin-film solar cells in general.
