Photo-excitation production of medically interesting isomers using intense γ-ray source

Pan, Wan-ting; Song, Tan; Lan, Haiping; Ma, Zhiguo; Zhang, Jingli; Zhu, Zhichao; Luo, Wen

doi:10.1016/j.apradiso.2020.109534

Cited by 15 publications

(5 citation statements)

References 31 publications

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“…For example, new energystorage materials [51][52][53][54], medical isotopes [55][56][57], nuclear clocks [58,59], or nuclear gamma-ray lasers [60,61]. Especially for nuclear γ-ray lasers whose lifetimes of excited states are needed as short as nanosecond or even shorter [61,62], due to the relatively large emission linewidth of Doppler broadening, it is a big challenge for traditional accelerators or reactors to pump nuclei to these excited states efficiently [63,64].…”

Section: Isomer Excitation Resultsmentioning

confidence: 99%

Laser plasma accelerated ultra-intense electron beam for efficiently exciting nuclear isomers

Feng¹,

Li²,

Tan³

et al. 2022

Preprint

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Utilizing laser plasma wakefield to accelerate ultra-high charge electron beam is critical for many pioneering applications, for example to efficiently produce nuclear isomers with short lifetimes which may be widely used. However, because of the beam loading effect, electron charge in a single plasma bubble is limited in level of hundreds picocoulomb. Here, we experimentally present that a hundred kilo-ampere, twenty nanocoulomb, tens of MeV collimated electron beam is produced from a chain of wakefield acceleration, via a tightly focused intense laser pulse transversely matched in dense plasma. This ultra-intense electron beam ascribes to a novel efficient injection that the nitrogen atom inner shell electrons are ionized and continuously injected into multiple plasma bubbles. This intense electron beam has been utilized to exciting nuclear isomers with an ultra-high peak efficiency of 1.76 × 10 15 particles/s via photonuclear reactions. This efficient production method of isomers can be widely used for pumping isotopes with excited state lifetimes down to picosecond, which is benefit for deep understanding nuclear transition mechanisms and stimulating gamma-ray lasers.

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Section: Isomer Excitation Resultsmentioning

confidence: 99%

Laser plasma accelerated ultra-intense electron beam for efficiently exciting nuclear isomers

Feng¹,

Li²,

Tan³

et al. 2022

Preprint

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“…High directivity, intense flux and narrow spatial and energy distributions make laser Compton scattering (LCS) 𝛾-ray beams suitable tools for nuclear applications with costly target materials. Due to the small beam spot size, less target material is necessary for producing the required specific activities, which is critical for medical radioisotopes production [1,2], as well as for low energy and low cross section measurements of (𝛾, 𝛾 ′ ) and (𝛾, particle) reactions for nuclear astrophysics [3][4][5][6] and nuclear structure studies [7,8]. The use of 𝛾-ray beams with small opening angle is also advantageous for absolute reactions cross sections measurements, as compact targets of a few mm diameter are enough for the entire photon flux to be impinged on the target surface.…”

Section: Introductionmentioning

confidence: 99%

Spatial profiles of collimated laser Compton-scattering γ-ray beams

Takashi¹,

Gheorghe²,

Filipescu³

et al. 2023

J. Inst.

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The intensity and energy spatial distributions of collimated laser Compton scattering (LCS) γ-ray beams and of the associated bremsstrahlung beams have been investigated as functions of the electron beam energy, electron beam phase space distribution, laser optics conditions and laser polarization. We show that the beam halo is affected to different extents by variations in the above listed parameters. In the present work, we have used laser Compton scattering simulations performed with the eliLaBr code (https://github.com/dan-mihai-filipescu/eliLaBr) and real LCS and bremsstrahlung γ-ray beams produced at the NewSUBARU synchrotron radiation facility. A 500 μm MiniPIX X-ray camera was used as beamspot monitor in a wide γ-ray beam energy range between 1.73 MeV and 38.1 MeV.

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“…[7][8][9][10][11][12][13][14] There is an increasing demand for the generation of ext remely short γ-ray pulses at different photon energies with high brightness. Sufficiently high energy and bright γ-rays are useful to simu late the celestial p rocess and extreme environ ments 15,16 , and to study various nuclear interactions for medical isotope production [17][18][19] and nuclear waste transmutation 20,21 and nondestructive inspection of contrabands 22 . Furthermore, tunable attosecond γ-ray pulses will allow probing ultrafast nuclear dynamics.…”

Section: Introductionmentioning

confidence: 99%

Brilliant attosecond γ-ray emission and high-yield positron production from intense laser-irradiated nano-micro array

Zhang

Huang

et al. 2021

Physics of Plasmas

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We investigate a novel scheme for brilliant attosecond γ-ray emission and high-yield positron production, which is accomplished with an ultra-intense laser pulse incident upon a Nano-Micro array (NMA) with substrate incorporated. This scheme is able to realize effectively electron acceleration and collid ing geometry. Both the γ-ray flash and positron bunch are then generated with high conversion efficiency. At laser intensity of 8 × 10 23 W/cm 2 , ~27% of the laser energy is transferred successfully into the γ-rays, and ~0.7% of the laser energy into the positrons. As a consequence, ultra-short (~440 as) and ultra-brilliant (~10 24 photons s −1 mm −2 mrad −2 per 0.1%BW @ 15 MeV) γ-ray burst, and high-yield (1.48 × 10 11 ) and overdense (~10 22 cm −3 ) positron bunch are generated. We found a sub-linear scaling of laser-to-photon conversion efficiency (∝ 𝐼 0 0.75 ) and a super-linear scaling of laser-to-positron conversion efficiency ( ∝ 𝐼 0 2.5 ) with the laser intensity.Multi-dimensional particle-in-cell simulat ions show that particle (γ photon and positron) generation can be manipulated by laser-focusing position, and NMA's length and spacing.Optimal conditions for particle generation in NMAs are obtained, indicat ing that micro wire array has the advantage over nanowire array in particle generation in the extreme laser fields. Furthermore, positron annihilat ion effect in high-energy-density (HED) environ ment is discussed. The scheme using NMAs would provide effective avenues toward investigating attosecond nuclear science and HED physics with the coming 10 PW laser facilities.

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Photo-excitation production of medically interesting isomers using intense γ-ray source

Cited by 15 publications

References 31 publications

Laser plasma accelerated ultra-intense electron beam for efficiently exciting nuclear isomers

Laser plasma accelerated ultra-intense electron beam for efficiently exciting nuclear isomers

Spatial profiles of collimated laser Compton-scattering γ-ray beams

Brilliant attosecond γ-ray emission and high-yield positron production from intense laser-irradiated nano-micro array

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