Activation method combined with characteristic X-ray counting: A possibility to measure ( α , γ ) cross sections on heavy p -nuclei

Details Activation method combined with characteristic X-ray counting: A possibility to measure ( α , γ ) cross sections on heavy p -nuclei Activation method combined with characteristic X-ray counting: A possibility to measure ( α , γ ) cross sections on heavy p -nuclei

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011nupha.867...52k&link_type=abstract

Nuclear Physics A, Volume 867, Issue 1, p. 52-65.

Physics

Nuclear Physics

Nuclear Reactions, +169 Tm ( Α, Γ ), ( Α, N ), E = 11.5 – 17.5   Mev, Measured, Eγ, Iγ, E ( K X-Ray ), I ( K X-Ray ), Deduced, Σ, Activation Method With Hpge And Leps Detectors

Scientific paper

For an improved modeling of the astrophysical nucleosynthesis of p -nuclei, low energy cross section data of alpha-induced reactions on heavy isotopes are needed. Technical difficulties hamper the experimental determination of these cross sections, therefore the relevant experimental data are almost completely missing. Here we present a new method for the cross section measurements, the activation technique based on the detection of characteristic X-ray radiation. The feasibility of the method is illustrated through the measurement of the 169 Tm ( α , γ ) 173 Lu and 169 Tm ( α , n ) 172 Lu reaction cross sections. Despite the relatively long half-life of the reaction products ( T = 500 and 6.7 days, respectively) it was possible to measure the cross section of the 169 Tm ( α , γ ) 173 Lu reaction between E = 13.16 and 17.08 MeV. The 169 Tm ( α , n ) 172 Lu reaction cross section was derived from close above the threshold up to E = 17.08 MeV . Details of the new method and the experimental results are presented.

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