Ranges of ⁷Li Produced in ¹⁰B(n,α)⁷*Li Reaction

Abstract

Line shape of prompt y ray / Doppler broadening / '°B(n,a)^*Li reaction / Range oflA / Boron neutroncapture therapy AbstractThe ranges of 'Li and '*Li produced via the "'B(n,a)'*Li reaction in elementary boron and water were determined by analysis of the Doppler broadened line-shapes of the 478 IceV prompt yray from the shortlived '*Li (T = 1.05X10"" s). The spectral line-shapes of the prompt y rays were measured with a low background using neutron beams guided outside the reactor at JRR-3M. The ränge of 3.9 um estimated for 'Li in water is compared with that (4.8 um) used in boron neutron-capture therapy as an appropriate value.'"B(n,a)^*Li reaction. That of 'Li in water which has been regarded as an appropriate value in BNCT was obtained semi-experimentally [3]. The hne shapes of the prompt y ray of 478 keV from were investigated by Neuwirth et al. [4,5], relating the Doppler broadened line-shapes to the slowing-down processes of in matter. The present authors also measured and analyzed the prompt y ray using the neutron beam and the prompt y-ray analysis system [6,7] at the newly constructed JRR-3M reactor, Japan Atomic Energy Research Institute. In our analysis procedure, a parameter called "velocity degradation constant" D of was introduced. The ranges of ''*Li and 'Li were estimated using the D values determined experimentally.

Electrochemical Deposition of Biferrocene Derivative-Attached Gold Nanoparticles and the Morphology of the Formed Film

“…The Prompt γ -ray Neutron Activation Analysis (PGA) Method. , Boron content of the film was assayed by the PGA method. The Au n −BFc film employed for the analysis was prepared in a solution of 15 μM Au n −BFc (θ BFc = 7.5) at HOPG in Bu 4 NBF 4 −CH 2 Cl 2 with 120 potential scans.…”

Fitting special peak shapes of prompt gamma spectra

“…the (n,) reaction. Some important exceptions, such as the (n,) reaction on 10 B [2][3][4] and (n,n′) reaction in the HPGe crystal [5], however, create structures in the gamma spectra that are specific to PGAA, making the evaluation of such spectrum regions imprecise with the available methodology. In addition, the regions containing the annihilation peak also require special attention due to its broadened peak width [6][7].…”