title: Microtesla NMR J-coupling spectroscopy with an unshielded atomic magnetometer.
abstract: We present experimental data and theoretical interpretation of NMR spectra of remotely magnetized samples, detected in an unshielded environment by means of a differential atomic magnetometer. The measurements are performed in an ultra-low-field at an intermediate regime, where the J-coupling and the Zeeman energies have comparable values and produce rather complex line sets, which are satisfactorily interpreted.
authors.affiliation: DIISM, University of Siena, Italy.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Bevilacqua
authors.affiliation: DIISM, University of Siena, Italy.
authors.forename: Valerio
authors.initials: V
authors.lastname: Biancalana
authors.affiliation: Dep. of Electr. and Computer Engin., Ben-Gurion University of the Negev, Israel.
authors.forename: Andrei Ben-Amar
authors.initials: AB
authors.lastname: Baranga
authors.affiliation: DSFTA, University of Siena, Italy.
authors.forename: Yordanka
authors.initials: Y
authors.lastname: Dancheva
authors.affiliation: DBCF, University of Siena, Italy.
authors.forename: Claudio
authors.initials: C
authors.lastname: Rossi
keywords: Atomic magnetometry; Differential measurement; J-coupling; Remote detection; Trimethyl-phosphate; Ultra low field NMR