FRIB News article
Very happy about this FRIB News article titled Study provides new insight into the origin of a rare proton-rich isotope highlighing my PhD thesis work.
Artemis Tsantiri
I am a Postdoctoral Research Fellow at the University of Regina working with Prof. Gwen Grinyer on experiments at TRIUMF. I obtained my PhD in nuclear astrophysics at the Facility for Rare Isotope Beams at Michigan State University working under Prof. Artemis Spyrou in the SuN group. I received my diploma from the School of Applied Mathematical and Physical Sciences of the National Technical University of Athens with Prof. Mike Kokkoris as my supervisor.I am interested nuclear astrophysics, the study of the mechanisms that form the chemical elements in the cosmos. By using experimental techniques I study nuclear reactions that take place inside stars.
News
2026
2025
PhD thesis work published on Phys. Rev. Letters
The main results of my PhD thesis have been published in Physical Review Letters. This work is the first measurement of the 73As(p,γ)74Se reaction, marking only the second measurement of a reaction relevant to the γ process in the astrophysically important energy range with a radioactive ion beam. The experiment was performed at the Facility for Rare Isotope Beams using the SuN detector. These measurements provide improved constraints for models describing the production of a rare group of nuclei known as the p nuclei in exploding massive stars.
IReNA Online Seminar Series
This year I'm part of the IReNA Online Seminar Organizing Committee, a group of postdocs organizing a biweekly series of seminars on nuclear astrophysics. Seminars are recorded and can be viewed on the IReNA YouTube channel.
ACTAR TPC @ TRIUMF
Starting in my postdoc position, I spent the summer of 2025 at TRIUMF, working with the Active Target and Time Projection Chamber (ACTAR TPC) from GANIL. The campaign included three experiments, one of which I will analyze as part of my postdoctoral research.
Invited Talk
I was honored to give my first invited talk at the BRIDGCE-IReNA 2025 Annual Meeting, where I presented my PhD thesis work on the production of 74Se in the astrophysical γ process. It was a great opportunity to share my research and connect with many new researchers. I am grateful to the organizers for the invite and to IReNA for supporting my attendance.
PhD Thesis Defense
On March 17th, 2025, I successfully defended my PhD thesis!
The work regards to proton-capture cross-section measurements for the astrophysical γ process, with main focus on the first measurement of 73As(p,γ)74Se, one of the main destruction mechanisms of the lightest p nucleus, 74Se. Using network calculations of the γ process in Type II supernovae, we showed that our measured cross section significantly reduces the uncertainty in 74Se production!
2024
IReNA Young Researchers Organization Blog
The academic journey is filled with unique challenges and opportunities, so we created a blog to share stories of navigating it.
Find more about the blog and how to participate.
Student Representative of IReNA's Young Reasearchers Organization
I'm so excited to become the new student representative of the IReNA Steering Committee and Young Reasearchers Organization! See full article here.
Find more about IReNA and the participating networks here.2023
Detroit Free Press
The Detroit Free Press published a story about FRIB in which I appear while giving a tour for Michigan Math and Science Scholars.
See photo gallery here and read full article here
CeNAM Frontiers in Nuclear Astrophysics
I had the honor of being the co-chair of the Organizing Committee for the 2023 CeNAM Frontiers in Nuclear Astrophysics Meeting at FRIB.
Read article here.Publications
- Ong et al, Mar 2026, Phys. Rev. Lett. 136,
092502
Beta-Decay Half-Lives beyond 54Ca: A Systematic Survey of Decay Properties Approaching the Neutron Dripline - Ronning et al, Feb 2026, Nucl.
Instrum. Methods Phys. Res. A, 170930
The upgraded summing NaI(Tl) (SuN++) absorption spectrometer
2026
- Tsantiri et al, Nov 2025, Phys. Rev. Lett. 135,
212701
Constraining the Synthesis of the Lightest p Nucleus 74Se - Greaves et al, Nov 2025, Phys.
Lett. B, 139992
Probing the Limits of Statistical Neutron Capture for the r process: Experimental Constraints on 141Cs Nuclear Level Densities - Ogunbeku et al, Aug 2025, Phys. Rev. Lett.
135, 072501
Universal Effective Charges in the sd and fp Shells - Wheeler et al, Jun 2025, Nucl.
Instrum. Methods Phys. Res. A, 1080, 170659
Object detection with deep learning for rare event search in the GADGET II TPC - Owens-Fryar et al, Jun 2025, Phys. Rev.
C 111, 065801
Total absorption spectroscopy for the β+ decay strength distribution of 60Ga - Tsintari et al, Jan 2025, Phys.
Rev. Research 7, 013074
Machine learning enabled measurements of astrophysical (p,n) reactions with the SECAR recoil separator
2025
- Spyrou et al, May 2024, Phys.
Rev. Lett. 132, 202701
First Study of the 139Ba(n,γ)140Ba Reaction to Constrain the Conditions for the Astrophysical i Process - Cox et al, April 2024, Phys.
Rev. Lett. 132, 152503
Proton Shell Gaps in N = 28 Nuclei from the First Complete Spectroscopy Study with FRIB Decay Station Initiator
2024
- Pogliano et al, June 2023, Phys. Rev.
C 107, 064614
Experimentally constrained 165,166Ho(n,γ) rates and implications for the s process - Tsantiri et al, March 2023, Phys. Rev.
C 107, 035808
Cross-section measurement of the 82Kr(p,γ)83Rb reaction in inverse kinematics
2023
- Palmisano-Kyle et al, June 2022, Phys. Rev.
C 105, 065804
Constraining the astrophysical p process: Cross section measurement of the 84Kr(p,γ)85Rb reaction in inverse kinematics
2022
- Michalopoulou et al, September 2021, European
Physical Journal A 57(9),
Measurement of the 232Th(n,f) cross section with quasi-monoenergetic neutron beams in the energy range 2–18 MeV
Erratum on November 2021, European Physical Journal A 57(11)
2021
- Chasapoglou et al, April 2020, HNPS
Advances in Nuclear Physics 27:106
Study of the 232Th(n,f) Cross section at NCSR ‘Demokritos’ using Micromegas Detectors