A polarized ion source

Ad'yasevich, B.P.; Antonenko, V.; Polunin, Yu. P.; Fomenko, Dmitri E.

doi:10.1088/0368-3281/7/2/310

Cited by 6 publications

(8 citation statements)

References 5 publications

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“…Such unexpectedly high orbital angular momenta in the entrance channel are probably due to the large interaction radius for the participating deuterons. In a transition matrix element analysis by Ad'yasevich, Antonenko, and Fomenko [6,7], which has been extended by Lemaitre and Schieck [8], 16 complex matrix elements (ME's) were included for each reaction.…”

Section: Introductionmentioning

confidence: 99%

Tensor analyzing powers forH2(d,p)3
Fletcher
¹
,
Ayer
²
,
Black
³

et al. 1994
Phys. Rev. C
19
2
16
0
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Angular distributions of the tensor analyzing powers A"and A -A» for the reactions H(d, p) H and H(d, n) He are presented at deuteron energies of 25, 40, 60, and 80 keV. The analyzing powers for the two reaction channels are quite similar at these energies. The data have been included in an R-matrix analysis of the four nucleon system. According to this analysis, transitions from entrance-channel quintet-S states are important in these reactions, so that the use of polarized fuels would not result in a neutron-lean fusion reaction.PACS number(s): 21.45.+v, 24.70.+s, 25.10.+s, 25.45.z

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Section: Introductionmentioning

confidence: 99%

Tensor analyzing powers forH2(d,p)3
Fletcher
¹
,
Ayer
²
,
Black
³

et al. 1994
Phys. Rev. C
19
2
16
0
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“…At deuteron lab energies below 30 keV P waves of the relative motion in the entrance channel contribute strongly and even D waves are visible below 100 keV. Taking D-wave contributions into account doubles the number of transitions to 16. Consequently for the complete determination of the transition matrix elements in the above sense many different experiments are needed.…”

mentioning

confidence: 99%

Complete determination of the transition amplitudes from a comprehensive data analysis of the fusion reactions D(d,p)³H and D(d,n)³He for E_d<500 keV

Lemaı̂tre

Schieck

1993

Annalen der Physik

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All relevant low-energy transition amplitudes for the D(d,n)'He and D(4p)'H reactions were determined from a fit to Legendre expansion coefficients of the available experimental data. A simple barrier penetrability model was used. Quintet S-wave transitions are found to contribute strongly thus obliterating the idea of neutron-lean "polarized" fusion energy production. The D + D interaction radius was determined with good accuracy for both reactions individudly. The astrophysical S functions show a small S-wave enhancement and Fwave suppression of the D (~f , p )~I f branch. Apart from possible applications the investigation of the D+D reactionswhich have received special interest from the beginning of nuclear reaction studiesis of interest in itself: the four-nucleon system is the lightest one exhibiting excited states. With the advent of faster computers and with the successes of rigorous theoretical calculations in the three-nucleon system e.g. 111 using modern meson-exchange potentials [2, 3, 4, 51 there is hope for realistic microscopic calculations (such as those based on Faddeev theory) also for this system, see e.g. [6]. The observed differences for the two branches of this system with identical particles in the entrance channel lend themselves to studies of the role of Coulomb interaction in the exit channel and possible charge-symmetry breaking effects. Comprehensive surveys of the four-nucleon system have been published recently [7, 81.On the other hand these fusion reactions play a role in nuclear astrophysics and furthermore they accompany the main reactions in planned light-particle fusion reactors. The economically advantageous concept of "neutron-lean" fusion energy production by using the 3He(d,p)4He reaction would only be realizable if the accompanying neutrons from the D(d,n)3He reaction could be suppressed. For this purpose the use of polarized "fuel" has been suggested where the neutron production via the entrancechannel spin-quintet states was assumed to be strongly suppressed [9, 101. This concept has been contradicted by some authors [11, 121 and will also be studied in this work.

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“…sections [1] and nonzero vector analyzing power [2][3][4] indicate the contributions of the entrance P and D waves are important even at deuteron bombarding energies below 100 keV. These reactions are also of interest for fusion energy applications, especially for the proposal of a "neutron-lean" H-He fusion reactor with polarized deuterons [5].…”

mentioning

confidence: 99%

“…Spin-dependent observables, such as analyzing powers, are important for understanding of these fusion reactions. However, to our knowledge no systematic measurements of the analyzing powers for these reactions have been published except two papers [2,6] and a few reports [3,4,7]. Measurement of analyzing powers at very low energies is difficult.…”

mentioning

confidence: 99%

“…In the present measurement, the background-to-signal ratio was less than 1/100 at Ed = 30 keV. The vector and tensor analyzing powers, iT», Tz0, Tz"and Tzz, were obtained by measuring each cross section of the incident deuteron beams with the mr=+1, mr=0, and mr= -1 deuteron magnetic substates from the polarized source for the following three particular orientations of the spin-quantization axis: (1) normal to the scattering plane ( Y axis) in case of the measurements of iT» and A~~( = -&3Tzz -Tzo/&2), (2) Fig. 2…”

mentioning

confidence: 99%

See 1 more Smart Citation

A polarized ion source

Cited by 6 publications

References 5 publications

Tensor analyzing powers forH2(d,p)3
Fletcher
¹
,
Ayer
²
,
Black
³

et al. 1994
Phys. Rev. C
19
2
16
0
View full text Add to dashboard Cite

Tensor analyzing powers forH2(d,p)3
Fletcher
¹
,
Ayer
²
,
Black
³

et al. 1994
Phys. Rev. C
19
2
16
0
View full text Add to dashboard Cite

Complete determination of the transition amplitudes from a comprehensive data analysis of the fusion reactions D(d,p)³H and D(d,n)³He for E_d<500 keV

Analyzing powers forH2(d,p)3
Tagishi
¹
,
Nakamoto
²
,
Katoh
³

et al. 1992
Phys. Rev. C
21
4
12
0
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A polarized ion source

Cited by 6 publications

References 5 publications

Tensor analyzing powers forH2(d,p)3Fletcher1, Ayer2, Black3 et al. 1994Phys. Rev. C192160View full textAdd to dashboardCite

Tensor analyzing powers forH2(d,p)3Fletcher1, Ayer2, Black3 et al. 1994Phys. Rev. C192160View full textAdd to dashboardCite

Complete determination of the transition amplitudes from a comprehensive data analysis of the fusion reactions D(d,p)3H and D(d,n)3He for Ed<500 keV

Analyzing powers forH2(d,p)3Tagishi1, Nakamoto2, Katoh3 et al. 1992Phys. Rev. C214120View full textAdd to dashboardCite

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Tensor analyzing powers forH2(d,p)3
Fletcher
¹
,
Ayer
²
,
Black
³

et al. 1994
Phys. Rev. C
19
2
16
0
View full text Add to dashboard Cite

Tensor analyzing powers forH2(d,p)3
Fletcher
¹
,
Ayer
²
,
Black
³

et al. 1994
Phys. Rev. C
19
2
16
0
View full text Add to dashboard Cite

Complete determination of the transition amplitudes from a comprehensive data analysis of the fusion reactions D(d,p)³H and D(d,n)³He for E_d<500 keV

Analyzing powers forH2(d,p)3
Tagishi
¹
,
Nakamoto
²
,
Katoh
³

et al. 1992
Phys. Rev. C
21
4
12
0
View full text Add to dashboard Cite