Compilation and Analysis of Intermediate-and High-energy Photon and Electron Induced Spallation Yields

Jönsson, G.; Lindgren, Kristian

doi:10.1088/0031-8949/7/1-2/004

Cited by 41 publications

(40 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Apart from obvious differences in threshold energies, * this would be consistent with the cascade-evaporation hypothesis (Kumbartzki et al, 1971;Jonsson and Lindgren, 19 73) 0 The rationale and method of this procedure are presented in greater detail elsewhere (Swanson, 1974b).…”

Section: II Calculationmentioning

confidence: 65%

Activation of Aluminum Beam Dumps by High-energy Electrons at SLAC

Swanson¹

1975

Health Physics

View full text Add to dashboard Cite

Water-cooled Al beam dumps are used at SLAC to absorb the energy of high-intensity electron beams through development of a massive electromagnetic cascade. The aluminum becomes activated and constitutes a moderate radiation hazard. Decay-curve measurements made near two such dump installations are presented and compared with calculation.The most important radionuclides produced in the Al are identified as 24 Na(Ti = 14.96 h) and 22 Na(Ti = 2.62 yr). It is found that other activated materials, particularly Fe shielding, can increase the exposure rates near such installations significantly, and must be considered. A formula is given which is useful for predicting dose rates for operational health-physics use,Recommendations are made with a view to reducing doses to personnel who must work in the vicinity of such installations.

show abstract

Section: II Calculationmentioning

confidence: 65%

Activation of Aluminum Beam Dumps by High-energy Electrons at SLAC

Swanson¹

1975

Health Physics

View full text Add to dashboard Cite

show abstract

“…[21]. The parabola results after parameters a^f, Β, K, and C of equation (1) having been determined by least-squares fitting (Table 1).…”

Section: ) Discussionmentioning

confidence: 99%

“…A systematization of these measurements was carried out by JONSSON and LlNDGREN [1] by using the CDMD (charge distributions and mass distribution ) RUDSTAM's five-parameter formula [2].…”

Section: Introductionmentioning

confidence: 99%

“…The parameter Β gives the rate of decreasing of the cross section for the different isotopic distribution curves; it is related to the slope of the yield-surface ridge as introduced by HALPERN etal. [5], The parameter tf gives the width of the distribution described by equation (1) and has dimension of (number of protons) -2 . The parameter C is related to the coefficient of "average retention" of charged particles due to the Coulomb potential barrier of the target nucleus.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Systematics of Photon- and Electron-Induced Spallation Reactions

1989

View full text Add to dashboard Cite

A semi-empirical four-parameter formula is proposed in order to systematize intermediate-and high-energy photon-and electroninduced spallation cross sections of medium weight nuclei. Analytical expressions for the parameters are obtained from parameter-values calculated by best-fitting of experimental data. We extend the same treatment to bremsstrahlung-induced spallation yields, and we verify that very similar analytical expressions for the parameters are obtained. Such a four-parameter formula has shown to predict reliable values of unmeasured spallation reaction cross sections. The reproducibility of the experimental data by the present formula is comparable with or better than those by other semi-empirical formulae with a larger number of parameters.

show abstract

“…The average cross section 6, calculated with the 1/E-approximation, shows a mainly exponential decrease with the mass number A r of the target, which is in agreement with the assumption that 24Na is produced by a cascade-evaporation mechanism. Using the semi-empirical formula of Rudstam [2], g for the production of 24Na from different targets with At<65 has been estimated by Jonsson and Lindgren [3]. Agreement with the experimental values was good.…”

Section: Introductionmentioning

confidence: 98%