0000000000210738

AUTHOR

G.j. Kunde

showing 5 related works from this author

The PHENIX Collaboration

2009

Nuclear physicsPhysicsNuclear and High Energy PhysicsNuclear Physics A
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Electromagnetic fission of $^{238}$U at 600 and 1000 MeV per nucleon

1995

Electromagnetic fission of238U projectiles at E/A =600 and 1000 MeV was studied with the ALADIN spectrometer at the heavy-ion synchrotron SIS. Seven different targets (Be, C, Al, Cu, In, Au and U) were used. By considering only those fission events where the two charges added up to 92, most of the nuclear interactions were excluded. The nuclear contributions to the measured fission cross sections were determined by extrapolating from beryllium to the heavier targets with the concept of factorization. The obtained cross sections for electromagnetic fission are well reproduced by extended Weizsacker-Williams calculations which include E1 and E2 excitations. The asymmetry of the fission fragme…

PhysicsNuclear and High Energy PhysicsCold fissionCluster decayFissionNuclear Theorychemistry.chemical_elementUraniumResonance (particle physics)Nuclear physicschemistryNuclear fusionAtomic physicsBerylliumNuclear ExperimentNucleonNuclear Physics
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Gamma-Ray spectral energy in HAWC J1825-134 region

2022

The Earth is bombarded by ultrarelativistic particles, known as cosmic rays (CRs). CRs with energies up to a few PeV (=1015eV), the knee in the particle spectrum, are believed to have a Galactic origin. One or more factories of PeV CRs, or PeVatrons, must thus be active within our Galaxy. The direct detection of PeV protons from their sources is not possible since they are deflected in the Galactic magnetic fields. Hundred TeV {gamma}-rays from decaying {pi}0, produced when PeV CRs collide with the ambient gas, can provide the decisive evidence of proton acceleration up to the knee. Here we report the discovery by the High Altitude Water Cerenkov (HAWC) observatory of the {gamma}-ray source…

observational astronomyAstrophysics and AstronomyGamma-ray astronomyPhysicsGamma ray astronomyNatural SciencesSpectral energy distribution
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"Table 1" of "Electromagnetic fission of U-238 at 600-MeV and 1000-MeV per nucleon"

1997

Electromagnetic fission.

Nuclear TheoryIntegrated Cross SectionU238 U --> 2FRAGB XU238 C --> 2FRAGB XU238 AU --> 2FRAGB XCross SectionPhysics::Classical PhysicsSIGU238 AL --> 2FRAGB XU238 IN --> 2FRAGB XInclusiveU238 CU --> 2FRAGB XPhysics::Atomic and Molecular ClustersNUCLEUS NUCLEUS --> 2FRAGB XNuclear Experiment
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HAWC Gamma-Ray survey, AGNs at TeV photon energies

2022

The High Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory continuously detects TeV photons and particles within its large field of view, accumulating every day a deeper exposure of two-thirds of the sky. We analyzed 1523days of HAWC live data acquired over four and a half years, in a follow-up analysis of 138 nearby (z<0.3) active galactic nuclei from the Third Catalog of Hard Fermi-LAT sources culminating within 40{deg} of the zenith at Sierra Negra, the HAWC site. This search for persistent TeV emission used a maximum- likelihood analysis assuming intrinsic power-law spectra attenuated by pair production of gamma-ray photons with the extragalactic background light. HAWC clearly detec…

observational astronomyActive galactic nucleigalactic and extragalactic astronomyAstrophysics and AstronomyGamma-ray astronomyhigh energy astrophysicsPhysicsGamma ray astronomySurveysNatural Sciences
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