Critical consideration of the statistical model analysis of photonuclear isomeric cross-section ratios

Bartsch, Helen; Huber, Klaus; Kneißl, U.; Krieger, Hanno

doi:10.1016/0375-9474(76)90106-8

Cited by 52 publications

(40 citation statements)

References 17 publications

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“…As we already stated in our previous paper [4] there seems to exist a linear correlation between the deduced spin cut-off parameter (SCOP) and the centre of spins (COS) of the isomeric pair. This relation can be explained by a more detailed consideration of the simple Huizenga-Vandenbosch decision model for the population of the isomeric-and the groundstate (isomeric pair).…”

Section: S(e Eo)o~(e) Dementioning

confidence: 72%

“…1). Together with the known isomer at 97.8 keV (tl/2 = 15.5 ps) this enables a new test of the decision model of the HVM as we have done recently in the tl~ [4]. The results of the statistical model analysis of the possible isomeric ratios in 99Mo are listed in Table 1.…”

Section: Discussion Of the Z~176 N) And ~ ~ Ru(y P)-reactionsmentioning

confidence: 95%

“…This SCOP is related to the nuclear moment of inertia. A presentation and a first discussion of the applicability of the Huizenga-Vandenbosch-method (HVM) to the analysis of photonuclear and (n, 2n)-reactions has recently been reported [4]. The most important results were: i) For (7, xn)-and (n, 2n)-reactions the SCOP, derived from the HVM, often agrees with the centre of spins (COS), which is the mean value of the spins of the isomeric pair.…”

Section: Introductionmentioning

confidence: 99%

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Systematic trends in the analysis of photonuclear cross section ratios

et al. 1978

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Isomeric cross section ratios were measured for the photonuclear reactions l~176 99ml'm2'gMo and l~ l~Using the Huizenga-Vandenbosch-method spin cutoff parameters were deduced. The applicability of this statistical procedure is discussed. A systematic analysis of all known (~,,x n) isomeric ratio-measurements shows a linear correlation between derived spin cut-off parameters and the mean value of the spins of the isomeric pair.

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Section: S(e Eo)o~(e) Dementioning

confidence: 72%

Section: Discussion Of the Z~176 N) And ~ ~ Ru(y P)-reactionsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Systematic trends in the analysis of photonuclear cross section ratios

et al. 1978

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“…The energy independent branching ratio offers reasonable estimates, while the WE branching ratio experiences problems. Complications arise in 89 Y because 75% of the photoproton cross section between 14 and 24 MeV decays directly [23][24][25]. The partial direct decay behavior in the proton channel will not be accounted for by the WE theory, which calculates decay rates for compound nucleus reactions.…”

Section: Graphical Depictions Of This Data Are Shown In Figures 6-20mentioning

confidence: 99%

Electromagnetic Dissociation Cross Sections Using Weisskopf-Ewing Theory

Adamczyk

Norbury

2011

Nuclear Technology

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“…The isomeric ratios furnish valuable information about the energy level structure of nuclei and the nuclear reaction mechanism involved [1][2][3][4][5]. This quantity depends on the spin of target nucleus and the intake angular momentum determined by the mass and the energy of projectile particles.…”

Section: Introductionmentioning

confidence: 99%

The Study of Isomeric Ratios in Photonuclear Reactions Forming High Spin Isomers in the Giant Dipole Resonance Region

Thiep¹,

An²,

Cường³

et al. 2015

Comm. in Phys.

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Abstract. We studied the isomeric ratios in odd-odd nuclei 196 Au, 182 Ta and 194 Ir with high spin isomeric states produced in 197 Au(γ, n) 196m,g Au, 183 W(γ, p) 182m,g Ta and 185 Pt(γ, p) 194m,g Ir reactions by using the activation technique and γ-ray spectroscopic method in the giant dipole resonance (GDR) region. The high-purity natural Au, W and Pt foils in disc shape were irradiated with bremsstrahlungs generated from an electron accelerator Microtron. The irradiated foils were measured by the high resolution γ-ray spectroscopic system which consists of a Ge(HP) detector and a multichannel analyzer. In order to improve the accuracy of the experimental results, necessary corrections were made in the γ-ray activity measurements and data analysis. The results were analyzed, discussed and compared with those of other authors as well as with theoretical model calculations. The study shows that the isomeric ratios in nuclei with high spin isomeric states are much lower than that in low spin isomeric state isomers.

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Critical consideration of the statistical model analysis of photonuclear isomeric cross-section ratios

Cited by 52 publications

References 17 publications

Systematic trends in the analysis of photonuclear cross section ratios

Systematic trends in the analysis of photonuclear cross section ratios

Electromagnetic Dissociation Cross Sections Using Weisskopf-Ewing Theory

The Study of Isomeric Ratios in Photonuclear Reactions Forming High Spin Isomers in the Giant Dipole Resonance Region

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