Interactions of relativistic neon to nickel projectiles in hydrogen, elemental production cross sections

Knott, C. N.; Albergo, S.; Caccia, Z.; Chen, C. X.; Costa, S.; Crawford, H. J.; Cronqvist, M.; Engelage, J.; Ferrando, P.; Fonte, R.; Greiner, L.; Guzik, T. G.; Insolia, A.; Jones, F. C.; Lindstrom, P. J.; Mitchell, J. W.; Potenza, R.; Romański, J.; Russo, G.; Soutoul, A.; Testard, O.; Tull, C. E.; Tuvé, C.; Waddington, C. J.; Webber, W. R.; Wefel, J. P.

doi:10.1103/physrevc.53.347

Cited by 49 publications

(17 citation statements)

References 17 publications

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“…Due to uncertainties in the σ 0 parameter that determines the momentum widths in the model, the acceptance correction is a source of additional uncertainty, as explained in detail below. We also compare the results obtained here to those obtained in other experiments [6][7][8]. Comparisons of the fragmentation cross sections from 36 Ar and 40 Ar beams are of particular interest, as the observed differences in the fragment cross sections have been ascribed to the differing isospin values (T z = 0 and T z = -2, respectively) of the beam ions.…”

Section: Introductionsupporting

confidence: 55%

Fragmentation cross sections of medium-energyCl35,Ar40
Zeitlin
¹
,
Guetersloh
²
,
Heilbronn
³

et al. 2008
Phys. Rev. C
45
3
29
0
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Charge-changing and fragment production cross sections at 0• have been obtained for interactions of 290, 400, and 650 MeV/nucleon 40 Ar beams, 650 and 1000 MeV/nucleon 35 Cl beams, and a 1000 MeV/nucleon 48 Ti beam. Targets of C, CH2, Al, Cu, Sn, and Pb were used. Using standard analysis methods, we obtain fragment cross sections for charges as low as 8 for Cl and Ar beams, and as low as 10 for the Ti beam. Using data obtained with small-acceptance detectors, we report fragment production cross sections for charges as low as 5, corrected for acceptance using a simple model of fragment angular distributions. With the lower-charged fragment cross sections, we can compare the data to predictions from several models (including NUCFRG2, EPAX2, and PHITS) in a region largely unexplored in earlier work. As found in earlier work with other beams, NUCFRG2 and PHITS predictions agree reasonably well with the data for charge-changing cross sections, but do not accurately predict the fragment production cross sections. The cross sections for the lightest fragments demonstrate the inadequacy of several models in which the cross sections fall monotonically with the charge of the fragment. PHITS, despite not agreeing particularly well with the fragment production cross sections on average, nonetheless qualitatively reproduces some significant features of the data that are missing from the other models.

show abstract

Section: Introductionsupporting

confidence: 55%

Fragmentation cross sections of medium-energyCl35,Ar40
Zeitlin
¹
,
Guetersloh
²
,
Heilbronn
³

et al. 2008
Phys. Rev. C
45
3
29
0
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show abstract

“…In the parametrization by Wahl, the smooth behavior is represented by the geometric mean between odd and even yield values. Odd-even effects were discovered also in light complex fragments produced in high-energy fragmentation and spallation reactions [15,16,17,18,19,20,21]. The staggering consisted again in an intensification of the yields of even charges Z with respect to odd ones, although the reaction mechanism, the shape of the charge distributions and the investigated mass region were obviously different from those of low-energy fission experiments.…”

Section: Introductionmentioning

confidence: 96%

Methods for a quantitative evaluation of odd-even staggering effects

Olmi¹,

Piantelli²

2015

Eur. Phys. J. A

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Abstract. Odd-even effects, also known as staggering effects, are a common feature observed in the yield distributions of fragments produced in different types of nuclear reactions. We review old methods, and we propose new ones, for a quantitative estimation of these effects as a function of proton or neutron number of the reaction products. All methods are compared on the basis of Monte Carlo simulations. We find that some are not well suited for the task, the most reliable ones being those based either on a non-linear fit with a properly oscillating function or on a third (or fourth) finite difference approach. In any case, high statistic is of paramount importance to avoid that spurious structures appear just because of statistical fluctuations in the data and of strong correlations among the yields of neighboring fragments.

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“…At the end of the 1980s, several CR and particle physicists gathered in the so-called "Transport Collaboration" [46], proposing a dedicated program focused on, but not restricted to, data from Z < 26 beams. A significant effort was made by Bill Webber and his colleagues, who measured a number of isotopic production cross sections using secondary ion beams on liquid hydrogen, carbon, and methylene CH 2 targets (and using a CH 2 -C subtraction technique) in the energy range ∼400-800 MeV/n [47][48][49][50][51][52][53][54][55][56][57][58][59]. The cross sections measured by the members of the Transport Collaboration and assembled from the literature along with the existing at that time semiempirical codes (WNEW and YIELDX [52,60,61]) were made available to the community through a dedicated web-site.…”

Section: Introductionmentioning

confidence: 99%

Current status and desired precision of the isotopic production cross sections relevant to astrophysics of cosmic rays: Li, Be, B, C, and N

et al. 2018

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The accuracy of the current generation of cosmic-ray (CR) experiments, such as AMS-02, PAMELA, CALET, and ISS-CREAM, is now reaching ∼1-3% in a wide range in energy per nucleon from GeV/n to multi-TeV/n. Their correct interpretation could potentially lead to discoveries of new physics and subtle effects that were unthinkable just a decade ago. However, a major obstacle in doing so is the current uncertainty in the isotopic production cross sections that can be as high as 20-50% or even larger in some cases. While there is a recently reached consensus in the astrophysics community that new measurements of cross sections are desirable, no attempt to evaluate the importance of particular reaction channels and their required accuracy has been made yet. It is, however, clear that it is a huge work that requires an incremental approach. The goal of this study is to provide the ranking of the isotopic cross sections contributing to the production of the most astrophysically important CR Li, Be, B, C, and N species. In this paper, we (i) rank the reaction channels by their importance for a production of a particular isotope, (ii) provide comparisons plots between the models and data used, and (iii) evaluate a generic beam time necessary to reach a 3% precision in the production cross-sections pertinent to the AMS-02 experiment. This first roadmap may become a starting point in the planning of new measurement campaigns that could be carried out in several nuclear and/or particle physics facilities around the world. A comprehensive evaluation of other isotopes Z ≤ 30 will be a subject of follow-up studies.

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Interactions of relativistic neon to nickel projectiles in hydrogen, elemental production cross sections

Cited by 49 publications

References 17 publications

Fragmentation cross sections of medium-energyCl35,Ar40
Zeitlin
¹
,
Guetersloh
²
,
Heilbronn
³

et al. 2008
Phys. Rev. C
45
3
29
0
View full text Add to dashboard Cite

Fragmentation cross sections of medium-energyCl35,Ar40
Zeitlin
¹
,
Guetersloh
²
,
Heilbronn
³

et al. 2008
Phys. Rev. C
45
3
29
0
View full text Add to dashboard Cite

Methods for a quantitative evaluation of odd-even staggering effects

Current status and desired precision of the isotopic production cross sections relevant to astrophysics of cosmic rays: Li, Be, B, C, and N

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Interactions of relativistic neon to nickel projectiles in hydrogen, elemental production cross sections

Cited by 49 publications

References 17 publications

Fragmentation cross sections of medium-energyCl35,Ar40Zeitlin1, Guetersloh2, Heilbronn3 et al. 2008Phys. Rev. C453290View full textAdd to dashboardCite

Fragmentation cross sections of medium-energyCl35,Ar40Zeitlin1, Guetersloh2, Heilbronn3 et al. 2008Phys. Rev. C453290View full textAdd to dashboardCite

Methods for a quantitative evaluation of odd-even staggering effects

Current status and desired precision of the isotopic production cross sections relevant to astrophysics of cosmic rays: Li, Be, B, C, and N

Contact Info

Product

Resources

About

Fragmentation cross sections of medium-energyCl35,Ar40
Zeitlin
¹
,
Guetersloh
²
,
Heilbronn
³

et al. 2008
Phys. Rev. C
45
3
29
0
View full text Add to dashboard Cite

Fragmentation cross sections of medium-energyCl35,Ar40
Zeitlin
¹
,
Guetersloh
²
,
Heilbronn
³

et al. 2008
Phys. Rev. C
45
3
29
0
View full text Add to dashboard Cite