Electron Paramagnetic Resonance (EPR), nke a na-akpọkwa Electron Spin Resonance (ESR) bụ usoro resonance magnetik nke na-achọpụta ntụgharị resonance n'etiti steeti ike nke eletrọn na-enweghị njikọ na mpaghara magnetik etinyere.

Usoro EPR na-abụkarị sistemụ ndọta, sistemu microwave na sistemụ nyocha eletrọnịkị. A na-ekewa sistemu ndọta n'ime elektrọnmagnetị, ihe ndọta na-adịgide adịgide na ihe ndọta dị elu dịka ụkpụrụ na mpaghara ndọta bụ isi na-ewepụta oghere ndọta. Ugbu a, a na-ejikarị magnetik na electromagnet na-adịgide adịgide.

Ihe ndọta na-adịgide adịgide nwere ike ịnọgide na-enwe magnetism na-adịgide adịgide, ụgwọ ọrụ ha na-akwụ na nrụzi dị ntakịrị, enwere ike ịmepụta ha ka ha mepee ma buru ibu na dayameta, nke bụ ihe enyemaka maka ndị ọrịa nwere claustrophobia.

0.041T nnukwu oghere oghere EPR nke CSJ mepụtara bụ magnet na-adịgide adịgide. A na-eji ihe ndọta na-adịgide adịgide na-emepụta oghere magnetik kwụsiri ike, eriri igwe na-ekpochapụ na-enye ike ka ọ mepụta oghere magnetik na-adịghị mma, a na-enyekwa eriri igwe modul iji mepụta ebe ndọta agbanwe agbanwe. Ọ na-arụ ọrụ na ihe ndị ọzọ iji mepụta akara resonance paramagnetic eletrọnịkị, si otú a na-edepụta nlele ule. Nyocha nke, ọkwa, wdg.