Single-shot temperature measurement based on laser-driven neutron resonance spectroscopy

Koizumi, Mitsuo ; Lan, Z.*; Arikawa, Yasunobu*; Wei, T.*; Mirfayzi, S. R.*; Hayakawa, Takehito*; Morace, A.*; Kamiyama, Takashi*; Sato, Hirotaka*; Tatsumi, Yuta*; Abe, Yuki*; Fujioka, Shinsuke*; Mima, Kunioki*; Kodama, Ryosuke*; Yogo, Akifumi*

We demonstrated single-shot, element-specific temperature measurement inside objects using laser-driven neutron resonance spectroscopy. Neutron resonance transmission spectra were measured through tantalum (Ta) and silver (Ag) foils, with the Ta foil heated from 300 K to 600 K while the Ag foil remained at room temperature. The temperature dependence of the resonance Doppler broadening in Ta agreed with the free gas model. This technique enables rapid, nuclide-resolved thermometry capable of capturing instantaneous temperature rise in a single laser shot.