Determination of the Branching Ratio for the Decay of Rho Mesons into Muon Pairs

1966 ◽  
Vol 16 (1) ◽  
pp. 35-38 ◽  
Author(s):  
J. K. dePagter ◽  
J. I. Friedman ◽  
G. Glass ◽  
R. C. Chase ◽  
M. Gettner ◽  
...  
Keyword(s):  
Branching Ratio ◽  
Muon Pairs ◽  
Rho Mesons

scholarly journals Probing Dense QCD Matter: Muon Measurements with the CBM Experiment at FAIR

Particles ◽  
2021 ◽  
Vol 4 (2) ◽  
pp. 205-213
Author(s):  
Anna Senger ◽  
Peter Senger
Keyword(s):  
Performance Studies ◽  
Reaction Rates ◽  
High Density ◽  
Streaming Data ◽  
Qcd Phase Diagram ◽  
Chemical Potentials ◽  
Muon Pairs ◽  
Caloric Curve ◽  
Density Equation

The Compressed Baryonic Matter (CBM) experiment at the future Facility for Antiproton and Ion Research (FAIR) in Darmstadt is designed to investigate the properties of high-density QCD matter with multi-differential measurements of hadrons and leptons, including rare probes such as multi-strange anti-hyperons and charmed particles. The research program covers the study of the high-density equation-of-state of nuclear matter and the exploration of the QCD phase diagram at large baryon chemical potentials, including the search for quark matter and the critical endpoint of a hypothetical 1st order phase transition. The CBM setup comprises detector systems for the identification of charged hadrons, electrons, and muons; for the determination of collision centrality and the orientation of the reaction plane; and a free-streaming data read-out and acquisition system, which allows online reconstruction and selection of events up to reaction rates of 10 MHz. In this article, emphasis is placed on the measurement of muon pairs in Au-Au collisions at FAIR beam energies, which are unique probes used to determine the temperature of the fireball, and hence to search for a caloric curve of QCD matter. Simultaneously, the subthreshold production of charmonium can be studied via its dimuon decay in order to shed light on the microscopic structure of QCD matter at high baryon densities. The CBM setup with focus on dimuon measurements and the results of the corresponding physics performance studies will be presented.

scholarly journals Improved experimental determination of the branching ratio for β-delayed α decay of 16N

2017 ◽  
Vol 165 ◽  
pp. 01031
Author(s):  
Oliver S. Kirsebom ◽  
Irene M. Alonso ◽  
Tom Berry ◽  
Maria J. G. Borge ◽  
Esben R. Christensen ◽  
...  
Keyword(s):  
Experimental Determination ◽  
Branching Ratio ◽  
Α Decay

scholarly journals Determination of the cluster-decay branching ratio from a near-threshold molecular state in Be10

2020 ◽  
Vol 101 (3) ◽  
Author(s):  
W. Jiang ◽  
Y. L. Ye ◽  
C. J. Lin ◽  
Z. H. Li ◽  
J. L. Lou ◽  
...  
Keyword(s):  
Branching Ratio ◽  
Molecular State ◽  
Cluster Decay ◽  
Near Threshold

Determination of the KS decay branching ratio

1969 ◽  
Vol 30 (7) ◽  
pp. 498-499 ◽  
Author(s):  
G. Bozóki ◽  
E. Fenyves ◽  
E. Gombosi ◽  
E. Nagy ◽  
G. Surányi ◽  
...  
Keyword(s):  
Branching Ratio

Determination of the branching ratio of the decayπ0→e+e−

1993 ◽  
Vol 71 (1) ◽  
pp. 27-30 ◽  
Author(s):  
A. Deshpande ◽  
C. Alliegro ◽  
V. Chaloupka ◽  
J. Egger ◽  
H. A. Gordon ◽  
...  
Keyword(s):  
Branching Ratio

Pressure Vessel Investigations of the Former Greifswald NPP: Fluence Calculations and Niobium Based Fluence Measurements

2006 ◽  
Author(s):  
J. Konheiser ◽  
U. Rindelhardt ◽  
H.-W. Viehrig ◽  
B. Boehmer ◽  
B. Gleisberg
Keyword(s):  
Fast Neutron ◽  
Pressure Vessel ◽  
Half Life ◽  
Branching Ratio ◽  
Assessment Tools ◽  
Surveillance Program ◽  
Integrity Assessment ◽  
Icp Ms ◽  
Nb Content

Pressure vessel integrity assessment after long-term service irradiation is commonly based on surveillance program results. Nevertheless, only the investigation of RPV material from decommissioned NPPs enables the evaluation of the real toughness response. Such a chance is given now through the investigation of material from the former Greifswald NPP (VVER-440/230) to evaluate the material state of a standard RPV design and to assess the quality of prediction rules and assessment tools. The operation of the four Greifswald units was finished in 1991 after 12–15 years of operation. In autumn 2005 the first trepans (diameter 120 mm) were gained from the unit 1 of this NPP. Some details of the trepanning procedure will be given. The paper mainly deals with the retrospective dosimetry based on Niobium, which is a trace element of the RPV material. The reaction 93Nb(n,n′)93mNb with an energy dependence highly correlated to radiation damage and a half life of the reaction product of 16.13 years is well suited for retrospective fast neutron dosimetry. Fluence calculations using the code TRAMO were based on pin-wise time dependent neutron sources and an updated nuclear data base (ENDF/B-VI release 8). The neutron spectra were determined at the trepan positions. The different loading schemes of unit 1 (standard and with 4 or 6 dummy assemblies) were taken into account. The calculated specific 93mNb activities for February, 2006 at the sample positions were determined to 16.3 Bq/μg Nb for sample 1, (0.1cm distance from inner wall), and 4.0 Bq/μg Nb for sample 2 (11.5 cm distance from inner wall). Unfortunately, a second neutron reaction besides 93Nb(n,n′) leading to 93mNb-activity is the reaction 92Mo(n,γ)93Mo. 93Mo decays by electron capture to 93mNb with a half life of 4000 years and a branching ratio br = 0.88. As (n,γ)-reactions are produced mainly by low energy neutrons, being less important for material damage, the 93mNb-activity generated through the Mo-path should be determined separately and subtracted from the measured activity. For the sample 1 in the maximum flux azimuthal position of weld SN4 with a Nb-content of 8 ppm and an Mo-content of 4000 ppm for February 3, 2006 was obtained a Mo-induced 93mNb-activity of 80 Bq/g steel, amounting to 37.7% of the total 93mNb-activity. It turns out that the 93mNb generation on the second path is nearly of the same order as the fast neutron induced generation from Niobium. For the experimental determination of the 93mNb-activity the Nb-content was determined by ICP-MS (inductive coupled plasma mass spectrometry) after dissolution of the material sample. The radiochemical isolation of Nb was done by anion exchange separation. The radiochemical separation was accompanied by determination of the chemical yield of Nb using again the ICP-MS method. The measurement of the 93mNb activity was realized by Liquid Scintillation Spectrometry (LSC). The first comparison between the calculated and the measured 93mNb activities resulted in deviations between 15 and 50%. Possible reasons for the observed differences are discussed.

Determination of the mass, width, and (ΣπΛπ) branching ratio of theΣ(1381)baryon

1974 ◽  
Vol 9 (11) ◽  
pp. 3006-3014 ◽  
Author(s):  
S. R. Borenstein ◽  
G. R. Kalbfleisch ◽  
R. C. Strand ◽  
V. VanderBurg ◽  
J. W. Chapman
Keyword(s):  
Branching Ratio

Determination of the Ks decay branching ratio

1972 ◽  
Vol 47 (1) ◽  
pp. 94-98 ◽  
Author(s):  
E. Nagy ◽  
F. Telbisz ◽  
G. Vesztergombi
Keyword(s):  
Branching Ratio
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