Nuclear Thermometers from Isotope Yield Ratios

M. B. Tsang; W. G. Lynch; H. Xi; W. A. Friedman

doi:10.1103/physrevlett.78.3836

Isotope yield ratios as a probe of the reaction dynamics

Nuclear Physics A ◽

10.1016/0375-9474(87)90251-x ◽

1987 ◽

Vol 471 (1-2) ◽

pp. 191-204 ◽

Cited By ~ 11

Author(s):

W. Trautmann ◽

K.D. Hildenbrand ◽

U. Lynen ◽

W.F.J. Müller ◽

H.J. Rabe ◽

...

Keyword(s):

Reaction Dynamics ◽

Isotope Yield

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PROJECTILE FRAGMENTATION OF 36,40Ar INDUCED REACTIONS

International Journal of Modern Physics E ◽

10.1142/s0218301310016247 ◽

2010 ◽

Vol 19 (08n09) ◽

pp. 1815-1822

Author(s):

W. D. TIAN ◽

Y. G. MA ◽

H. W. WANG ◽

G. H. LIU ◽

C. W. MA ◽

...

Keyword(s):

Atomic Number ◽

Cross Sections ◽

Transmission Rate ◽

Neutron Number ◽

Projectile Fragmentation ◽

Fragment Separator ◽

Isotope Yield ◽

Ablation Model

Fragment yields for Z ≥ 5 from projectile fragmentation using primary beams of 36,40Ar at 50 MeV/nucleon on 64 Ni target have been measured in RIBLL fragment separator. We compare the fragment cross sections with the predictions of the empirical EPAX parametrization of fragmentation cross-sections and Statistical Abration-Ablation model (SAA) by considering the RIBLL separator transmission rate. Isotope yield ratios between these two reactions were calculated and isoscaling parameters α and β are extracted, their dependences on fragment atomic number Z and neutron number N were presented.

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INFLUENCES OF THE ISOSPIN-DEPENDENCE OF IN-MEDIUM NUCLEON–NUCLEON CROSS-SECTION AND MOMENTUM DEPENDENT INTERACTION ON ISOSCALING PARAMETER

International Journal of Modern Physics E ◽

10.1142/s0218301308010052 ◽

2008 ◽

Vol 17 (04) ◽

pp. 645-653 ◽

Cited By ~ 2

Author(s):

J. Y. LIU ◽

HUAN FENG HAO ◽

YONG ZHONG XING ◽

WEI ZUO ◽

XI GUO LEE

Keyword(s):

Cross Section ◽

Beam Energy ◽

Neutron Number ◽

Nucleon Nucleon ◽

Quantum Molecular Dynamics ◽

Central Collisions ◽

Isotope Yield ◽

Cross Section Formula ◽

Isospin Dependence ◽

Dependent Interaction

Influences of the isospin-dependent in-medium nucleon–nucleon cross-section [Formula: see text] and momentum-dependent interaction (MDI) on the isoscaling parameter α are investigated for two central collisions 40 Ca + 40 Ca and 60 Ca + 60 Ca . These collisions are with isospin dependent quantum molecular dynamics in the beam energy region from 40 to 60 MeV/nucleon. The isotope yield ratio R21(N, Z) for the above two central collisions depends exponentially on the neutron number N and proton number Z of isotopes, with an isoscaling. In particular, the isospin-dependent [Formula: see text] and MDI induce an obvious decrease of the isoscaling parameter α. The mechanism of the decreases of α by both [Formula: see text] and MDI are studied respectively.

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Power law behavior of the isotope yield distributions in the multifragmentation regime of heavy ion reactions

Physical Review C ◽

10.1103/physrevc.82.054602 ◽

2010 ◽

Vol 82 (5) ◽

Cited By ~ 32

Author(s):

M. Huang ◽

R. Wada ◽

Z. Chen ◽

T. Keutgen ◽

S. Kowalski ◽

...

Keyword(s):

Power Law ◽

Heavy Ion ◽

Heavy Ion Reactions ◽

Isotope Yield

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Isotope yield ratios of fragments from heavy-ion reactions

Physical Review C ◽

10.1103/physrevc.43.2432 ◽

1991 ◽

Vol 43 (5) ◽

pp. 2432-2433 ◽

Cited By ~ 8

Author(s):

F. Deák ◽

Á. Kiss ◽

Z. Seres ◽

A. Galonsky ◽

L. Heilbronn

Keyword(s):

Heavy Ion ◽

Heavy Ion Reactions ◽

Isotope Yield

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PROJECTILE FRAGMENTATION OF 36,40Ar INDUCED REACTIONS

International Journal of Modern Physics E ◽

10.1142/s0218301310015515 ◽

2010 ◽

Vol 19 (05n06) ◽

pp. 1076-1083

Author(s):

W. D. TIAN ◽

H. W. WANG ◽

Y. G. MA ◽

G. H. LIU ◽

C. W. MA ◽

...

Keyword(s):

Atomic Number ◽

Cross Sections ◽

Transmission Rate ◽

Neutron Number ◽

Projectile Fragmentation ◽

Isotope Yield ◽

Fragmentation Reactions ◽

Ablation Model

Fragment yields of projectile fragmentation reactions using primary beams of 36,40Ar at 50 MeV/nucleon on 64 Ni target have been measured. Fragment yields of different isotopes were obtained for Z ≥ 5 in RIBLL fragment seperator. We compare the extracted yields to the predictions of the empirical parametrization of fragmentation cross-sections(EPAX) and Statistical Abration-Ablation model(SAA) considering the RIBLL separator transmission rate. Isotope yield ratios between these 2 reactions were calculated, isoscaling parameters α and β, their dependence on fragment atomic number Z and neutron number N were calculated.

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Rubidium-82 Generator Yield and Efficiency for PET Perfusion Imaging: Comparison of Two Clinical Systems (Preprint)

10.2196/preprints.19521 ◽

2020 ◽

Author(s):

Robert Dekemp

Keyword(s):

Production Efficiency ◽

Total Activity ◽

Measurement Scale ◽

Clinical Use ◽

Dose Calibrator ◽

Empirical Correction ◽

Positron Emission ◽

Isotope Yield ◽

Clinical Systems ◽

Rubidium 82

UNSTRUCTURED Introduction. Strontium-82/Rubidium-82 (82Sr/82Rb) generators are used widely for positron emission tomography (PET) imaging of myocardial perfusion. In this study, the 82Rb isotope yield and production efficiency of two FDA-approved 82Sr/82Rb generators were compared. Methods. N=515 sequential daily quality assurance (QA) reports from 9 CardioGen-82® and 9 RUBY-FILL® generators were reviewed over a period of 2 years. A series of test elutions was performed at different flow-rates on the RUBY-FILL® system to determine an empirical correction-factor used to convert CardioGen-82® daily QA values of 82Rb activity (dose-calibrator ‘maximum’ of 50 mL elution at 50 mL/min) to RUBY-FILL® equivalent values (integrated ‘total’ of 35 mL elution at 20 mL/min). The generator yield (82Rb) and production efficiency (82Rb yield / 82Sr parent activity) were measured and compared after this conversion to a common scale. Results. At the start of clinical use, the system reported 82Rb activity from daily QA was lower for CardioGen-82® vs RUBY-FILL® (2.3 ± 0.2 vs 3.0 ± 0.2 GBq, p<0.001) despite having similar 82Sr activity. Dose-calibrator ‘maximum’ (CardioGen-82®) values were found to under-estimate the integrated ‘total’ (RUBY-FILL®) activity by ~24% at 50 mL/min. When these data were used to convert the CardioGen-82 values to a common measurement scale (integrated total activity) the CardioGen-82® efficiency remained slightly lower than the RUBY-FILL® system on average (88 ± 4% vs 95 ± 4%, p<0.001). The efficiency of 82Rb production improved for both systems over the respective periods of clinical use. Conclusions. 82Rb generator yield was significantly under-estimated using the CardioGen-82® vs RUBY-FILL® daily QA procedure. When generator yield was expressed as the integrated total activity for both systems, the estimated 82Rb production efficiency of the CardioGen-82® system was ~7% lower than RUBY-FILL® over the full period of clinical use.

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