The D-D cross-section and angular distribution between 55 and 430 keV

Davenport, P. A.; Jeffries, T O; Owen, Maureen; Price, F V; Roaf, D.

doi:10.1098/rspa.1953.0007

Cited by 16 publications

(4 citation statements)

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“…In Fig. 4 the same quantity is shown for the 2H(d, p)-reaction, containing the data of Davenport et al [29], Theus et al [34], Booth et al [24] and Tai et al [36], who all used thin gas targets in their experiments. Fig.…”

Section: (0 E) =-~ (Bo (E) + Bj (E) L2 (Cos 9)) (22)mentioning

confidence: 72%

The (2H-d)-reactions below 200 keV

Fick

Weiss

1973

Z. Physik

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The 2H(d,n)-and 2H(d,p)-reactions are studied for deuteron energies below 200 keV. It is shown that the R-matrix approach of Konopinski and Teller, which is very sensitive to the channel radius used, can be approximated in a way that the dependence on the channel radius does not appear explicitly. This approach appears to be formally equivalent to a kind of "direct approach" of Boersma. This equivalence answers the question why a direct approach to these reactions works at all at low energies. Each reaction is described by three parameters which are determined in a fit to the up to now available data.

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Section: (0 E) =-~ (Bo (E) + Bj (E) L2 (Cos 9)) (22)mentioning

confidence: 72%

The (2H-d)-reactions below 200 keV

Fick

Weiss

1973

Z. Physik

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“…We updated for each reaction the data sets from direct measurement to be compared with the THM one, to better estimate the impact of the indirect result. For the pt channel we have chosen data reported in Greife et al (1995), Krauss et al (1987), McNeill and Keyser (1951), Schulte et al (1972), Brown and Jarmie (1990), Ganeev et al (1957), Arnold et al (1954), Raiola et al (2002), Booth et al (1956), Davenport et al (1953), Von Engel and Goodyear (1961), Cook and Smith (1953), Moffatt et al (1952), Tie-Shan et al (2007), and Leonard et al (2006). The data set in Greife et al (1995) shows an enhanced S-factor at very low energy values due to the electron screening effect.…”

Section: H(dp) 3 Hmentioning

confidence: 99%

Direct and Indirect Measurements for a Better Understanding of the Primordial Nucleosynthesis

Spartà

Pizzone

Bertulani

et al. 2020

Front. Astron. Space Sci.

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The Big Bang Nucleosynthesis (BBN) model is a great success of nuclear astrophysics due to the outstanding agreement between observational and predicted light elements abundances. One exception, however, is the so-called "lithium problem." In this context, experimental efforts to measure the relevant reactions have been brought to an increased level of accuracy in measuring primordial abundances, and the introduction of indirect methods has allowed researchers to overcome the natural limitations of direct measurements in the energy range of interest for BBN. Here we review the results obtained from the application of the Trojan Horse Method to some of the most influential reactions of the standard network, such as 2 H(d,p) 3 H, 2 H(d,n) 3 He, 3 He(d,p) 4 He, 7 Li(p,α) 4 He, and 7 Be(n,α) 4 He. The relevant cross sections have been then used as new inputs to a classical BBN code, resulting in important constraints that make suggestions for a possible solution for the lithium problem outside of nuclear physics.

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“…S uch a plot is often called a Gamow plot and is frequently used in the analysis of the low energy data. Looking at the experimental results from three groups [2][3][4] in the energy region of about 8 to 100 k ev (center of mass), Brennan [5] has indicated that the d ata might suggest an increase in B of eq (1) with energy. Brennan calculated the D-D reaction cross section using a low energy approximation [6] to the small absorption method of Ostrofsky, Breit, and John son [7].…”

Section: (In= (A /E) Exp (-Be-i)mentioning

confidence: 99%

“…We see that the correction term can vary quite a bit depending on the value of Uo. Analyzing the available data [2][3][4], Brennan [5] decided on a value of Uo in the vicinity of 9 MeV.…”

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confidence: 99%

Energy dependence of the D-D reaction cross section at low energies

Brennan¹,

Coyne²

1964

J. RES. NATL. BUR. STAN. SECT. A.

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The energy variation of the approach cross section for the D-D reaction is calcu lated using several different methods. The s implest method assumes strong absorption inside the nuclear surface and uses the ''''KB ~pproximation: The slope of the Gamow p lot is in thiS c.ase a constant. A ~trong abso rptlOn model, wIthout vVKB approximation, leads to negatIve correctlOns to tlus co nstant slope . A weak absorption model which seems more applicable, gives both positive and negative corrections, depending O~l the depth of the nu cl?ar potential. ~ina Jl y, since the ~mount of ~bsorption seems important, the effects of varyll1g the absorptlOn are studi ed uSing the optical model. The possible influence of the P-waves is also investigated . An experimental study of the energy dependence of the slope of the Gamow plot should give information on the optical potential which one deuteron sees when it approac hes another deuteron.

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The D-D cross-section and angular distribution between 55 and 430 keV

Cited by 16 publications

References 1 publication

The (2H-d)-reactions below 200 keV

The (2H-d)-reactions below 200 keV

Direct and Indirect Measurements for a Better Understanding of the Primordial Nucleosynthesis

Energy dependence of the D-D reaction cross section at low energies

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