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$$s$$-process branching at $$^{185}$$W revised

Mohr, P.*; Shizuma, Toshiyuki; Ueda, Hiroyasu*; Goko, Shinji*; Makinaga, Ayano*; Hara, Kaoru*; Hayakawa, Takehito; Lui, Y.-W.*; Ogaki, Hideaki*; Utsunomiya, Hiroaki*

The neutron capture cross section of the unstable s-process branching nucleus $$^{185}$$W has been derived from experimental data of the inverse $$^{186}$$W($$gamma$$,n)$$^{185}$$W photodisintegration taken with monochromatic photon beams from laser Compton scattering. The result of $$sigma = 553 pm 60$$mb at $$kT = 30$$keV leads to a relatively high effective neutron density in the classical s process of $$N_{rm{n}} = 4.7 times 10^8,{rm{cm}}^{-3}$$. A realistic model for the s process in thermally pulsing AGB stars overestimates the abundance of $$^{186}$$Os significantly because of the relatively small neutron capture cross section of $$^{185}$$W.

Language

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English

Journal

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Physical Review C

Volume

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69

Number

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3

Pages

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p.032801_1 - 032801_4

Publication Year/Month

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2004/03

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Held date

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Location (country)

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Patent information

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PDF

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Paper URL

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https://doi.org/10.1103/PhysRevC.69.032801

DOI for research data

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Keywords

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光核反応; 中性子捕獲反応断面積; s過程

Research Facility

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Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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Accesses

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- Accesses

InCites™

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Percentile:84.6

Category:Physics, Nuclear

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