Absolute resonance strengths in the 6 , 7 Li ( α , γ ) 10 , 11 B reactions
نویسندگان
چکیده
The absolute strengths of the Eα = 1175 keV resonance in the 6 Li(α, γ) 10 B reaction and of the Eα = 814 keV resonance in the 7 Li(α, γ) 11 B reaction have been measured to ωγ = 366 ± 38 meV and ωγ = 300 ± 32 meV, respectively, in good agreement with previous values. These resonances can be used to measure the absolute acceptance of the recoil separator ERNA to a precision of about 10%.
منابع مشابه
J un 1 99 3 1 Alpha scattering and capture reactions in the A = 7 system at low energies
Differential cross sections for 3 He-α scattering were measured in the energy range up to 3 MeV. These data together with other available experimental results for 3 He +α and 3 H +α scattering were analyzed in the framework of the optical model using double-folded potentials. The optical potentials obtained were used to calculate the astrophysical S-factors of the capture reactions 3 He(α, γ) 7...
متن کاملسطح بالای پاسخ ایمنی اختصاصی لنفوسیتهای CD4+وCD8+ نسبت به سیتومگالوویروس و همبستگی بین آنها در بیماران مبتلا به لوسمی لنفوسیتی مزمن سلولB
High level of CMV-specific CD4+ and CD8+cells Immune Response and Correlation Between them in B-cell Chronic Lymphocytic Leukemia Patients B. Pourgheysri [1] , P. Moss [2] Received: 10/09/07 Sent for Revision: 05/03/08 Received Revised Manuscript: 06/12/08 Accepted: 30/12/08 Background and Objective: Chronic lymphocytic leukemia (CLL) is characterized by a monoclonal proliferation o...
متن کاملThe Spallagenic Production Rates of Lithium , Beryllium and Boron
We calculate the production rates of 6 Li, 7 Li, 9 Be, 10 B and 11 B via spalla-tion of Carbon, Nitrogen and Oxygen nuclei by protons and α-particles and by α − α fusion reactions. We include recent measurements of the cross sections of α-α fusion reactions and find that the computations yield rates of 6 Li and 7 Li production that are nearly a factor of two smaller than previously calculated. ...
متن کاملStudy of the 3 He ( 4 He , γ ) 7 Be and 3 H ( 4 He , γ ) 7 Li Reactions in an Extended Two - Cluster Model ∗
Abstract. The He(He, γ)Be and H(He, γ)Li reactions are studied in an extended two-cluster model which contains α+ h/t and Li + p/n clusterizations. We show that the inclusion of the Li + p/n channels can significantly change the zero-energy reaction cross sections, S(0), and other properties of the Be and Li nuclei, like the quadrupole moments Q. However, the results agree with the known correl...
متن کاملThe realization of the dipole (γ, γ) method and its application to determine the absolute optical oscillator strengths of helium
The dipole (γ, γ) method, which is the inelastic x-ray scattering operated at a negligibly small momentum transfer, is proposed and realized to determine the absolute optical oscillator strengths of the vanlence-shell excitations of atoms and molecules. Compared with the conventionally used photoabsorption method, this new method is free from the line saturation effect, which can seriously limi...
متن کامل