A study on the location and community activity of the church in Tokyo

Nagai, Keiichi; Soshiroda, Akira; Tsutsumi, Takashi

doi:10.11361/cpij1.39.0.72.0

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“…When this is added to the 1/v component of 8.8 µbarn (assuming a thermal value of 8.8 mb) a total cross section of 11.0 µbarn is calculated, in good agreement with our experimental value. Recently, a complementary experiment for the cross section of 9 Be(n,γ ) 10 Be in the keV range was performed by Nagai et al [24] in a time-of-flight experiment utilizing the online detection of the prompt γ -rays associated with the production of 10 Be. Indeed, a similar value was found which confirms both the new AMS data and the calculated value.…”

Section: The Neutron-capture Cross Section Of 9 Be(nγ) 10 Bementioning

confidence: 99%

Measurement of the stellar cross sections for the reactions⁹Be(n,γ)¹⁰Be and¹³C(n,γ)¹⁴C via AMS

Wallner

Coquard

Dillmann

et al. 2007

J. Phys. G: Nucl. Part. Phys.

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We started a series of experiments, aiming at obtaining neutron-capture cross sections from measurements of the production of both long-lived nuclides 10Be and 14C, in the energy region of interest for astrophysical applications. Neutron-rich scenarios lead to the production of the long-lived radionuclides 10Be (t1/2 = 1.51 Myr) and 14C (t1/2 = 5730 yr) via neutron-capture reactions on 9Be and 13C, respectively. Data for both neutron-capture reactions are sparse and disagree in the astrophysical relevant energy region between 10 and 250 keV. Since (n,γ) cross sections in this mass and energy range are expected to be very small (some tens of µbarn), the combination of the activation technique and accelerator mass spectrometry (AMS) offers the powerful experimental approach which is necessary for such investigations. Beryllium oxide and enriched 13C graphite samples have been irradiated in a quasi-stellar neutron spectrum of kT = 25 keV at Forschungszentrum Karlsruhe. The subsequent AMS measurements were performed at the VERA (Vienna Environmental Research Accelerator) laboratory. The first AMS results confirm the expected low cross sections of about 10 µbarn for both reactions.

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Section: The Neutron-capture Cross Section Of 9 Be(nγ) 10 Bementioning

confidence: 99%

Measurement of the stellar cross sections for the reactions⁹Be(n,γ)¹⁰Be and¹³C(n,γ)¹⁴C via AMS

Wallner

Coquard

Dillmann

et al. 2007

J. Phys. G: Nucl. Part. Phys.

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A study on the location and community activity of the church in Tokyo

Cited by 1 publication

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Measurement of the stellar cross sections for the reactions⁹Be(n,γ)¹⁰Be and¹³C(n,γ)¹⁴C via AMS

Measurement of the stellar cross sections for the reactions⁹Be(n,γ)¹⁰Be and¹³C(n,γ)¹⁴C via AMS

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A study on the location and community activity of the church in Tokyo

Cited by 1 publication

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Measurement of the stellar cross sections for the reactions9Be(n,γ)10Be and13C(n,γ)14C via AMS

Measurement of the stellar cross sections for the reactions9Be(n,γ)10Be and13C(n,γ)14C via AMS

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Measurement of the stellar cross sections for the reactions⁹Be(n,γ)¹⁰Be and¹³C(n,γ)¹⁴C via AMS

Measurement of the stellar cross sections for the reactions⁹Be(n,γ)¹⁰Be and¹³C(n,γ)¹⁴C via AMS