Chang H.-PNakamura MKasai TKING-CHUEN LIN2022-04-252022-04-25202100268976https://www.scopus.com/inward/record.uri?eid=2-s2.0-85116526553&doi=10.1080%2f00268976.2021.1985643&partnerID=40&md5=baf6037781dd7d04ad6a6915b0c6121ehttps://scholars.lib.ntu.edu.tw/handle/123456789/606903A photodissociation experiment of (R)-3-bromocamphor was carried out by the hexapole orientation technique by (2 + 1) REMPI detection at about 234 nm. The atomic bromine products in excited state (Br 2P1/2) and in ground state (Br 2P3/2) were observed by the velocity map imaging. The anisotropy parameters of Br (2P1/2) and Br (2P3/2) were obtained as 0.75 ± 0.04 and 0.48 ± 0.03, respectively. In addition, we also successfully controlled (R)-3-bromocamphor, the bulky and asymmetric bio-molecule’s, spatial orientation using the electrostatic hexapole. The orientational distribution was derived and its orientation efficiency was estimated as |<cos θ>|=0.35. We carried out a slice imaging experiment with the spatially oriented parent molecules to study the photodissociation dynamics of (R)-3-bromocamphor. The angular analysis of the obtained slice images suggests fast axial recoiling of the bromine atomic fragments and comparable contributions from the multiple upper states involved in A-band excitation, which results in the relatively isotropic angular distributions. ? 2021 Informa UK Limited, trading as Taylor & Francis Group.bromocamphorHexapoleion imageorientationphotodissociationBromineExcited statesGround stateMoleculesAnisotropy parametersAtomic brominesBio moleculesBromocamphorExcited-statesIon imagesOrientationState selectorsVelocity map imagingPhotodissociation[SDGs]SDG7journal article10.1080/00268976.2021.19856432-s2.0-85116526553