Pion photoproduction on197Au to ground and isomeric states in197Hg

Blomqvist, I.; Bülow, Birgitta; Fredrikson, A.; Johnsson, B.; Jönsson, G.; Lindgren, Kristian; Nilsson, Mathias; Petersson, Richard; Glomset, O.; Freed, N.; Rhodes, William T.

doi:10.1007/bf01415199

“…In this paper we have used a relative branching ratio equal to 0.72 for E~ =0.275 MeV [7]. Concerning the (7, n-)-reaction on 197Au reported earlier [6], the measured mean cross section in the energy range 200 500MeV was found to be 69_+9~tb. The (7, n) cross section calculated with the above mentioned method is 34_+101ab at 400MeV.…”

Section: Calculations and Discussionmentioning

confidence: 97%

Some (?, ?? xn) reactions on197Au at intermediate energies

Bülow

¹

,

Johnsson

²

,

Jönsson

³

et al. 1979

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“…While there exist such experimental data for light nuclei, [ 288–292 ] we are not aware of such data for heavy nuclei. There are studies of charged‐pion photoproduction from heavy nuclei [ 293–295 ] using bremsstrahlung‐photon beams and radiochemical measurements, where the measured cross section corresponding to the final nucleus in the ground state actually include contributions of decays from excited states. To measure the cross section for producing free pions with final nuclei in the ground state, monochromaticity of the GF photons would be useful, especially for heavy nuclei where the energy difference between the nuclear ground state and the first excited state is typically smaller than in light nuclei.…”

Section: Nuclear Physics With Gf Secondary‐photon Beam On Fixed Targetsmentioning

confidence: 99%

Expanding Nuclear Physics Horizons with the Gamma Factory

Budker

¹

,

Berengut

²

,

Flambaum

³

et al. 2022

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The Gamma Factory (GF) is an ambitious proposal, currently explored within the CERN Physics Beyond Colliders program, for a source of photons with energies up to ≈400 MeV and photon fluxes (up to ≈1017 photons s−1) exceeding those of the currently available gamma sources by orders of magnitude. The high‐energy (secondary) photons are produced via resonant scattering of the primary laser photons by highly relativistic partially‐stripped ions circulating in the accelerator. The secondary photons are emitted in a narrow cone and the energy of the beam can be monochromatized, down to 10−3–10−6 level, via collimation, at the expense of the photon flux. This paper surveys the new opportunities that may be afforded by the GF in nuclear physics and related fields.

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“…While there exist such experimental data for light nuclei [282][283][284][285][286], we are not aware of such data for heavy nuclei. There are studies of chargedpion photoproduction from heavy nuclei [287][288][289] using bremsstrahlung-photon beams and radiochemical measurements, where the measured cross section corresponding to the final nucleus in the ground state actually include contributions of decays from excited states. To measure the cross section for producing free pions with final nuclei in the ground state, monochromaticity of the GF photons would be useful, especially for heavy nuclei where the energy difference between the nuclear ground state and the first excited state is typically smaller than in light nuclei.…”

Section: Photoproduction Of Bound π −mentioning

confidence: 99%

Expanding Nuclear Physics Horizons with the Gamma Factory

Budker,

Berengut,

Flambaum

et al. 2021

Preprint

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The Gamma Factory (GF) is an ambitious proposal, currently explored within the CERN Physics Beyond Colliders program, for a source of photons with energies up to ≈ 400 MeV and photon fluxes (up to ≈ 10 17 photons per second) exceeding those of the currently available gamma sources by orders of magnitude. The high-energy (secondary) photons are produced via resonant scattering of the primary laser photons by highly relativistic partially-stripped ions circulating in the accelerator. The secondary photons are emitted in a narrow cone and the energy of the beam can be monochromatized, eventually down to the ≈ 1 ppm level, via collimation, at the expense of the photon flux. This paper surveys the new opportunities that may be afforded by the GF in nuclear physics and related fields. CONTENTS 11.2. Photon Splitting 48 11.3. Photon Scattering 48 12. Nuclear physics with tertiary beams 49 12.1. Tertiary beams at the GF 49 12.2. Polarized electron, positron and muon sources 49 12.3. High-purity neutrino beams 50 12.4. Neutron and radioactive ion sources 50 12.5. Production of monoenergetic fast neutrons 51 12.6. Metrology with keV neutrons 51 13. Nuclear physics opportunities at the SPS 51 14. Speculative ideas and open questions 51 14.1. Applying the Gamma Factory ideas at other facilities 51 14.2. Nuclear waste transmutation 52 14.3. Laser polarization of PSI 52 14.4. Quark-gluon plasma with polarized PSI 52 14.5. Ground-state hyperfine-structure transitions in PSI 52 14.6. Detection of gravitational waves 53 15. Conclusions and optimistic outlook 53 Acknowledgments 53 Appendix 54 A. Survey of existing and forthcoming gamma facilities 54

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Pion photoproduction on197Au to ground and isomeric states in197Hg

Cited by 13 publications

References 16 publications

Some (?, ?? xn) reactions on197Au at intermediate energies

Some (?, ?? xn) reactions on197Au at intermediate energies

Expanding Nuclear Physics Horizons with the Gamma Factory

Expanding Nuclear Physics Horizons with the Gamma Factory

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