17 - 22 July Toronto, Canada
The 27th International Conference
on Atomic Physics


ICAP-27 will be held in person! In order to do so, the conference will follow all local and university health protocols, which are constantly evolving. We invite everyone to attend in-person, so long as it is safe for them do so; those who cannot be at the meeting in person due to logistical or health constraints might consider virtual registration.


[June 2022 update:] The University of Toronto will lift its mask requirement on July 1, 2022. Since we follow UofT policies, we will also no longer require masks at ICAP. Some participants may still choose to wear face coverings. We ask everyone to respect each other’s decisions and comfort levels. During breaks, those uncomfortable without a mask indoors will be able to use the outdoor spaces (such as Philosopher's Walk) for coffee and refreshments.


Following University policy as of May 2022, we will no longer be requiring proof of vaccination to attend ICAP. However please note that vaccination is still required for entry into Canada. Our registration web site provides the option of uploading proof of vaccination, for your convenience in case rules change.

[As of February 2022:] In accordance with the guidelines issued by the Province of Ontario and City of Toronto, the organizers of the 27th International Conference on Atomic Physics (ICAP-27) will require the proof of full vaccination to enter all of the conference venues.

Proof of full vaccination must comply with the Ontario regulations or the Government of Canada regulations. As the event is in late July, the number of doses required to enter a building may change; we will be required to follow the most current health guidelines. Exceptions will not be made, and we appreciate your patience (and kindness) while we all adjust to the changing requirements. To reduce line-up onsite, we ask you to upload your proof of vaccination in the registration system. You do not need to provide such proof as soon as you register. We request that you do so before July 6. Otherwise, you will be required to provide proof at the registration desk in order to obtain your conference badge.

[Update March 2022:] Ontario will eliminate most mask mandates — including in schools, restaurants and stores — across the province on March 21, with remaining COVID-19 regulations also set to drop by the end of April. However, employers may choose a more conservative policy, and so far the University of Toronto has not announced when mask mandates are removed for events such as conferences.

Symptoms and Self-Isolation

If you experience COVID-19, flu-like, or cold-like symptoms before or during the meeting, we ask you to self-isolate, and attend the meeting virtually. When in Toronto, rapid testing kits are available at pharmacies free of charge. If you have recently become ill with COVID-19, we ask that you wait at least 10 days since symptoms first appeared, before attending the meeting in person.


All delegates are responsible for their own travel and ensuring compliance with COVID-19 entry requirements. Please assess your personal situation and plan accordingly. Registration fees do not include insurance. We highly recommend all delegates arrange for travel and medical insurance that cover travel cancellation, interruption, reimbursement of hotel accommodation and rebooking costs due to quarantine.

Current regulations

The following sites may help guide your planning for ICAP-27:


Our FAQs page discusses several issues related to cancellation scenarios.