Reaction Constants for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">T</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mn /><mml:mo>(</mml:mo><mml:mi>p</mml:mi><mml:mo>,</mml:mo><mml:mi>n</mml:mi><mml:mo>)</mml:mo><mml:mn /><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">He</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>

Jarvis, G. A.; Hemmendinger, A.; Argo, H. V.; Taschek, R. F.

doi:10.1103/physrev.79.929

Cited by 47 publications

(5 citation statements)

References 12 publications

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“…(3) Some reported measurements have been superseded by or included in subsequent data sets, and should be considered accordingly. The data of Jarvis et al [50] are renormalized and included with additional data in Ref. [51].…”

Section: Appendix: Previous Datamentioning

confidence: 99%

Total cross section of the3H(p,n)3Hereaction from th

et al. 1999

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We report new measurements of the total cross section for the 3 H(p, n) 3 He reaction from threshold (Ep = 1.02 MeV) to Ep = 4.5 MeV. The experiment utilized specially prepared Ti-3 H targets, and neutrons were detected using a 4π detector. A weak resonant structure due to an excited state in 4 He is observed which was not seen in previous cross section measurements. A new expression for the 3 He(n, p) 3 H thermonuclear reaction rate for temperatures below 10 GK is presented which will allow for more accurate calculations of the yields of light elements produced by big-bang nucleosynthesis.

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Section: Appendix: Previous Datamentioning

confidence: 99%

Total cross section of the3H(p,n)3Hereaction from th

et al. 1999

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“…Finally, we cannot rule out the possibility that reaction (4) proceeds through reaction (5) and the decay of He 4 * by neutron emission, since the evidence on the existence or nonexistence of a well-defined level in He 4 is not conclusive. [5][6][7][8][9][10][11][12][13] Reference 10 cites a comparison of the neutron spectra from 18-Mev deuterons on helium-3 and tritium as …”

Section: Brolley Hall Rosen and Stewartmentioning

confidence: 99%

Experimental Evidence for the Reactiond+T→He3+n+n−3Mev

et al. 1958

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A continuum of doubly charged particles has been observed from the interaction of 12-and 14-Mev deuterons with tritium. They are shown to arise from the H 3 (d,2n)He 3 reaction. Absolute differential cross sections are obtained. No evidence for the formation of a dineutron in a bound state, or in a well-defined virtual state, was found. D URING the course of an investigation of the interaction of 12-and 14-Mev deuterons with tritium, we observed a sizable cross section for the emission of low-energy nuclei which appeared to exhibit the ionization characteristics of doubly charged ions. Experiments were consequently performed to determine the charge of the ions and, having established that they were indeed doubly charged, to identify their mass.The experimental arrangement is quite similar to that previously described 1 : a well-collimated beam of cyclotron-accelerated deuterons enters a reaction chamber in which the H 3 gas is confined to the central region, and the detectors are photographic emulsions arranged around the target in such a way as to record the charged reaction products at 2.5° intervals with an angular resolution of =bf°.The reaction products were identified as to charge on the basis of their specific ionization. In order to resolve singly and doubly charged ions, we used El emulsions which were processed by a combination of the two-solution and cold techniques. 2 A warm stage of 5-minutes duration was found to be optimum from the standpoint of discrimination between charge-1 and charge-2 particles whose range is less than 32 /JL. The -KNOWN H 3 -KNOWN He 3 IKUNKNOWN PARTICLES 16-32/A FROM END OF TRACK 0-16/A FROM END OF TRACK ft%1 i-idC.-A-bia LL. NUMBER OF GAPS FIG. 1.Results of gap-counts on the last 32 fx of track for the "unknown" particles and for He 3 particles and tritons elastically scattered by deuterons. The ranges of all tracks gap-counted are approximately the same so that counts were made at approximately the same depth within the emulsion. difficulty of identifying low-energy particles from their tracks in nuclear emulsion arises from the saturation properties of emulsion for highly ionizing particles.Identification was accomplished by "gap-counting" 3 one or two 16-/x segments, starting from the end of each heavily ionizing track in the range interval 16-100 JJ, (corresponding to 4-13 Mev He 3 nuclei) and comparing these results to corresponding counts on tracks made by He 3 particles and tritons elastically scattered by deuterons. Figure 1 shows the results of gap-counts on the particles of unknown charge with those from tritons and He 3 nuclei. It is seen that, even when counts are made over the last 16/x of track, the resolution is almost complete. We thus identify the particles under consideration as being doubly charged. It now remains to determine the source of these particles. This is done on the basis of energy and momentum conservation. The d-\-T interaction permits the emission of both charge 1 and charge 2 particles, the energetically possible reactions being :(1) d+T->d...

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“…The proton energy was kept below 1.02 Mev so as to avoid a large neutron background from the T z (p, w)He 3 reaction. 8 The zirconium used was 5.5 mg/cm 2 thick, and contained 0.47±0.05 atom of T 3 per atom of Zr throughout the bombardment. The gamma-rays were observed at an angle of 54.5 degrees to the proton beam in the laboratory system.…”

Section: R S Rochlinmentioning

confidence: 99%

Theory of Internal Conversion

Coish

1951

Phys. Rev.

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Reaction Constants forT3(p,n)He3

Cited by 47 publications

References 12 publications

Total cross section of the3H(p,n)3Hereaction from th

Total cross section of the3H(p,n)3Hereaction from th

Experimental Evidence for the Reactiond+T→He3+n+n−3Mev

Theory of Internal Conversion

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